Agreed, but then why are you "happy" with his performance if you've yet to use him? He hasn't helped you at all yet, he has next to zero trade value, he's just been taking up a bench spot, no? Maybe he'll help you this week, maybe he'll hurt you.
You're kind of painting with a broad brush here- many people (myself included) don't draft for the "safe" ~10 points, we prefer to go for upside with our later picks. Ironically I did draft Singletary this year (late), but had (and still have) zero intentions of ever starting him unless he breaks out and/or something happens to Moss. Neither have, so on the bench he sits (same with Moss for most owners)
Sure, reasonably consistently mediocre. Again, not what many people are looking for, those guys are a dime a dozen in most leagues.
I didn't exclude it because it was an outlier, I mentioned it because you excluded week 1 because he didn't play- well, he didn't play (for pretty much anyone in FF) in week 2 either. It's sort of a "functional" performance- he was in a lot more lineups last week for his bad performance than he was in week 2.
Again, that's why you drafted him, not why everyone did (plus people have them in dynasty). The only reason I drafted Singletary was in the off-chance that he exceeded expectations, likely due to injury to Moss. Hasn't happened, no biggie he was a late dart throw anyway. Yes, they are both performing about how they were expected to, I just think that's a lot less useful than you seem to (I know Singletary hasn't been in the lineup yet in my league since I own him, pretty sure last week was the first time Moss was and that was a bust).
I think the main point is that neither Bills RB has a high ceiling while the other is playing. Many people draft for ceiling, considering it isn't that difficult to find guys with their floor on the WW. A big part of the reason why their ceilings are so low is that there are so few TDs available for the RBs in Buffalo- why do you expect a "correction", when they're actually on a higher pace than the last 2 years? The RB pie in Buff is pretty small, only really worth using if there's only 1 option IMO.