1) it is the best team he faced in his career, by far
2) they seemingly exposed some of the weaknesses in his game; they had a long time to prepare their method of attack and when he is in the NFL that is the type of preparation he will be going up against.
3) he played like shit
Personally, I think there are other areas of his game that need continued work (he might be a step slow in the passing game, for example). I would likely think that right now he is at most a 2 down linebacker and those types of guys are late first round picks at best. If he could play all three downs, that would be different.
In short, if he tests well with footspeed and he interviews well about the Bama game, he can likely shoot up to a mid to high first round pick. If he doesn't test well, he will likely drop to late first to mid second. I believe he will interview well about the Bama game and the twitter nonsense and it will end up being a non-issue.