Two completely different thoughts, triggered by this thread.
First, I ran into Bartelone's uncle at the grocery store at the end of his second year at WSU (a year after he got hurt). I saw his Coug hat and it started a conversation; I don't know him. He didn't tell me what the injury was (I didn't ask), but at that time the family expected him to fully recover and possibly be able to play at 100% the next year. As we know, that didn't happen. But it suggests that the injury, or injuries, were something that would respond to time and healing. So it may not be over yet. Unfortunately, that is all that I can offer on that subject.
Second, I'll throw in my $0.02 on the D formation. I'm used to thinking of any front that puts a DL directly on the center as an odd man front. So for me it will be a 3 man front, even if you throw a LB up against a TE or where ever you put that 4th (small) guy on the line. And while it is easy fan shorthand to talk of a 4 man front even if it is an odd man front, it is good to understand that the offense treats a DL formation differently if there is a guy head-up on the center as opposed to if there is not. A guy on the center forces the OL blocking scheme to change, because a good nose guard/tackle will require a double team in a lot of situations, which then means that the OL has to somehow account for the LB's differently than if it were an even man front. One more related thought. It has been a very long time since we had a center who was able to handle a nose without the assistance of a guard. In short, we've had to double team nose tackles even if some other teams did not. That really messes with your run game, and it also makes you more vulnerable to a blitz. For me personally, a significant measure of how far our O line has come will be how often we need to double team a nose when we are playing an odd front defense. At least in passing situations, I'm hoping that we will be able to avoid the double team most of the time this year. If that proves to be the case, and our tackles can stay with outside speed rushers for 2.5 - 3 seconds, we will cut our sacks way down. And while I'm not sure how much our Oline improvement will help our rushing game, I suspect that our pass protection at least will be better. And a lot of that is is built around the assumption that our play at center (where we actually have competition between two relatively PAC-level guys) will be better.