Here is my deal with this argument. People are entitled to their opinions. I can understand why someone might think that Morency won't be a starter. But if your reasons for judgment are...
1.) Houston traded him away, he must suck.
2.) Green Bay will draft a running back.
3.) He hasn't done anything in the NFL yet.
4.) He was a third round pick, therefore he can't be good.
then you are basing your opinions on lacking evidence. Houston has been known for making bad roster decisions. Green Bay may/may not draft a running back in the first, regardless, if Morency is the starter on day 1 and runs well, the rookie will not start. There are a number of cases where a 3rd year player comes in and shines after sitting the bench for years.
If you have watched Morency run, and your opinions are, he dances too much, or he's injury prone, or he doesn't pass block well, then I can understand where you are coming from. Then you have an argument.
As for me, I'll wait to see what happens the rest of this offseason to make a solid judgment. If I were drafting now, I'd take him as a high upside flyer in the middle rounds.
ETA: One more thing. About the Houston trade. remember Mike Sherman had a boner for Samkon Gado. Most fantasy owners had a boner for Samkon Gado before last season. So regardless how it looks now, Houston's value of Morency might have been higher than what the trade leads you to believe.