No, I don't think he's shit I think he's average. Big difference and putting words in people's mouths doesn't place you above them so please don't in future.We're not going to buy jamie Vardy because we don't require an extra striker, we need an extra centre midfielder, and he needs to be homegrown. I don't see how he's a walking yellow card? I could be wrong here, and apologies if i am but i think Fernandinho has a higher game:card ratio and i don't think Delph's ratio is out of the norm or that he's particularly known for picking up yellows? You're entitled to your opinion on Delph, as i am mine, you obviously think he's shit and that's not going to change anytime soon and that's fair enough. My question to you then is simply, what's the alternative? If not Delph then who? Even with Pogba, we can't go into a season with 4 centre midfielders when we're starting 3 of them 3 times a week. We need somebody else, so who? and if they're not homegrown, who gets sold to accommodate them? I've seen schneiderlin mentioned, for me, he's not significantly better than Delph, he's just flavour of the month and with united rumoured to be in for him, i don't think he'd be willing to play a backup role for us anyway when he can be a starter for the rags. Swapping Willy for another HG keeper i would of agreed with 100% last season but after seeing Joe's return to form and after hearing him speak after the final whistle of the last game of the season when he singled Willy out as the main reason for his return to form i think he's worth his place in the squad if it means we get the Joe Hart of last season again.
At worst, If he turns out as poor as you think he is, he's an extra body in midfield for a season that can do a job when called upon for a relative pittance fee who we'll likely have no problem shifting for at least our money back if not for a profit, and given his homegrown status, he's not taking up a spot in the squad that could of otherwise gone to somebody else. That, to me makes him a no brainer.
And yes, he does have a reputation for persistently picking up yellow cards. A quick google search and you'll see an interview he gave in the Guardian in which he himself said he would have to change his ways.
If you don't see Schniederlin as a better player than Delph then we obviously differ greatly in opinion. I have already offered up reasoning and alternatives, both of which you addressed but still asked me "what are the alternatives?" So that was a bit odd.
To call Scheiderlin "flavour of the month" in comparison to Delph, to me, is very ironic.