One injury and we are basicly on our heals from there out. Imo
Eh, that's most positions on most teams. Just like there are 32 starting-caliber NFL quarterbacks at any given time, there aren't 32 starting caliber LTs at any given time. I'd estimate there's about 16-25 of each.
The bottom 7-16 just have to do the best they can with what they've got and do their best to work around it.
And similarly, Bhak isn't terrible, I think your assessment is excessively pessimistic. He's somewhere around the 13-15th best LT right now. He moves well, so speed rushers tend not to win, though he doesn't have optimal strength. He can be bullrushed more than you'd like. If last year was just a blip due to injury, he's fine. If he gains just a little bit of strength, he'll probably be able to anchor well enough.
In the run game, he doesn't get good movement at the point of attack, but again the movement, he's great at the second level and when he's backside.
He does get too many flags. False starts are fairly typical at LT, due to facing the premier and/or faster edge rusher--LTs tend to get jittery. He still had too many, imho.
Holding, eh, I'd guess about 1/2 of them aren't his fault, but he gets the flag. What begins as a legitimate pass block (where you punch and grab the chest plate of the man you're blocking, interestingly this isn't holding) can turn into hold once the quarterback starts scrambling.
Basically, hands and arms within the frame = not holding. Hands outside = holding. Your QB scrambles, the DE changes his path, boom, holding. If the LT had eyes in the back of his head, it probably wouldn't be: He would either change his positioning or at least know that he has to let go and the QB is responsible for not getting killed on his own.
