I think the best scouts would tell you that hitting a goo QB is a 50-50 proposition. Look at all the teams that passed on Dez round after round. The Boys took him only out of desperation.
This year's class is actually one of the better groups in recent years. Pool divides into 2 primary groups; pocket passers and mobile QBs. Obviously a few QBs transcend those lines. The top pocket passer is Trubisky. Watson is the top mobile guy, but does have a very strong arm.
If you look at Kiper's top 10 list he doesn't have Kelly (MS) who's a solid pocket passer prospect. He also doesn't have Flowers (USF) who might be the sleeper among the mobile QBs. He's a poor man's Wilson.
This draft will see the Cards take a QBOTF. It should be far more real a prospect than Logan Thomas. I think they will likely wait until the third or fourth round. I suspect Watson and Trubisky go before the Cards select. Maybe Kizer does as well, tough his stock seems to be dropping. Kaaya likely goes early round 2. He has a big arm, but accuracy on deep throws is an issue.
I would say this is an above average pool. The one thing I like to hear is that a QB is a student of the game. That's why I thought Bridgewater would succeed. Not picking up on this aspect is why Kurt Warner is missed. If the Cards do their homework they have a decent shot at a winner.