"Silva has as much ground skill as Yoshida, so he should have been able to submit Hunt too."
Try not to forget that up until a few days before the event, Wand thought he was fighting a guy that A) He owns, B) has his strengths in the exact opposite area of Hunt and C) weighs about 80lbs less than Hunt.
He came into this fight and everything was pretty much the opposite of what he was actually training for. He wasn't the bigger fighter, wasn't facing a guy he wanted to stay standing with, and wasn't facing someone he's fought before.
All that stuff changed with less than even two weeks for Wand to make adjustments, and if your opinion of him changed, then you were probably someone who thought Wand was God. He's not God. He's just a badass. A badass who took the fight on short notice, against a world class striker who's never been kayoed. I can't really think of any other top guys that would have agreed to that fight (aside from maybe Randy, and at Randy's age, it would have been an even worse idea)on such short notice.
Silva is still the man in his division IMO, and if there were room (time wise) for a rematch in which Silva was trained to face Hunt specifically, I think the outcome would be very different.