In answer to your questions:
1-You suggest that the Lions have seen enough of Smith to know he's not up to the task. Based on what? The fact that they knew well before the season started that Best and Leshoure wouldn't be available the first 2 weeks, yet did nothing to add a RB?/ They drafted Kevin Smith in 2008. After two years of watching him they used a #1 in 2010 on another RB who took his job. In 2011 they than used a premium second round pick on another RB. Pure speculation but most assumed it was to form a thunder and lighting type of duo. What can't be disputed is once they had these two they cut Kevin Smith. Kevin Smith than sat unemployed. As far as I know only got a tryout with the Dolphins. They only brought him back due to injuries to Leshoure and Best. When the season was over they were in no rush to sign Smith and for that matter no other team was in a rush to sign him either. Meanwhile a guy like Peyton Hillis who was an absolute train wreck last year got a $3million one year deal. Best Smith could get was what I think was the vet minimium one year deal. At that time and during the draft they could not know Leshoure would be suspended the first two games or that Best would still not be medically cleared. Once they found out both of those items the pickings of RB's were slim which is why they entered the season with Smith as their starter. Other than what the Lions have done I also have eyeballs and can see this guy is a middling talent. He's a solid professional but defenses don't fear him and don't respect the running game when he's playing.
You're assuming you know what was happening behind the scenes in Detroit, AND you are conveniently ignoring facts that don't support your argument. Kevin Smith was hurt in 2010, and Best was hampered by injuries, as well. THAT is most likely why they drafted another RB. It makes sense, doesn't it, if both your RBs are hurt, to acquire another one? And, BTW, they didn't cut Smith. His contract was up, and since he was coming off of an injury, they chose not to re-sign (especially since they had two "healthy" RBs on their roster. And you're right they didn't know Best would start on the PUP, or that Leshoure would be suspended, but they DID know in June that Leshoure would be suspended for 2 games, and they placed Best on the PUP on 8/27 (and probably knew he was going there earlier, since he was never cleared for practice). And, despite knowing these things, how many RBs did they bring in? None. As for your eyeballs, I don't think anyone is arguing that Smith is a HOFer, but he fits (very well) the Lions' offense. He is an adequate runner, good pass-blocker, and good receiver. BTW, I have eyeballs too, and they have seen Leshoure look VERY BAD against NFL competition since he blew out his achilles.
2-You also suggest that because they worked out Smith and Grant, that means they are preparing to move on/upgrade from Smith. Perhaps it indicates that they are worried that Best won't be back, or that Leshoure isn't going to be back from his injury enough to help them? Possible but if they had those concerns why wait until now? What happened to make those pressing issues right now? On the other hand they've got to see 2 games out of Smith before deciding to work out these two.
Maybe their has been some information about Best that has them worried? Maybe there has been some information about Leshoure that has them worried. We don't know that his happened, but we don't know that the workouts were b/c they were worried about Smith, yet you choose to believe that is the case, because of your Leshoure bias.
3-You suggest that they are going to give Leshoure every chance. Again, I ask based on what? Their coaches say they want to get him carries. Duh, he's back from suspension, and they haven't seen what he can do; of course they want to get him carries./ Besides Schwartz saying he's excited to see give him the ball I'd add based on 1. Lions beat writer who so far seems pretty reliable saying he thinks Leshoure gets 12-15 carries, 2. Comments from often reliable Chris Mortenson indicating he thinks hes going to get around 12 carries this week- keep in mind on this and point 1 the Lions RB's are only averaging 19 carries a game with Smith getting 16 a game. Unless this beat writer and Mort are just clueless were are Smiths carries coming from? 3. Comments from opposing head coach Mike Munchak who said stopping Leshoure was key to the game but hey maybe he was just trying to motivate Kevin Smith because that makes sense.
I've posted this before, but you have ABSOLUTELY NO IDEA what context those quotes were given. The coaches were asked about Leshoure, and they gave their responses. Munchak's comments were in response to being asked how they were going to prepare for Leshoure without much NFL film to go on. You can interpret that as him saying "Leshoure is great, we're very scared," but that isn't what he said. And (as far as I can find) Schwartz didn't say he was exited to give him the ball, but that "We’ve been waiting to get him on the field for a long time." Those are two very different quotes. As for the Lions beat writer, you say he's reliable, but he's still just guessing. Most SD beat writers said Gates was a go for last week, and until a day or so ago, most GB beat writers were saying Jennings was good for MNF. And Jaws isn't all that reliable when it comes to "scoops," check his record the last few years. Don't you think if the 15 carries was a lock, others would also be reporting it?
You think Leshoure is going to be great, and that's all well and good; but you are, (IMO) letting your Leshoure love cloud your analysis of this situation.This just makes you looks petty. Where did I say Leshoure would be great? What's a shame is people like you in these forums who think every time someone has an opinion about a player it's because they have some fantasy angle for their team. The thought process behind this is so ignorant to me I don't know were to begin. If I like a player or have him on my fantasy team what does it for for me or my team to start offering up one sided sunny opinions about said player? I mean really. Sometimes people just have opinions.
Sorry if I hurt your feelings. If the word "love" causes you to rant like that, however, you have very thin skin. Your "opinions" are very biased, and your analysis often is a result of you assuming facts not in evidence, and those "facts" are always either positive for Leshoure or negative for Smith.