It's tempting to try to break down complicated topics like our obvious OL problems into simple answers, such as being poorly scouted, poorly coached, or not given enough resources. It's more complicated than that in my view, and if we're posting on a forum on a bye week then we can handle some complexity.
LT: Cross has been solid and looks amazing compared to the rest of our line. He hasn't been as good as we were hoping with the 9th overall pick. It feels like we have to pick up the 5th year option this off-season, but that will make him the 9th highest paid LT (APY) with a one year guaranteed figure ($18.5m). Ideally he will finish this season well and we can work out an extension shortly after this season.
LG: I agree with Schneider here on not paying Damien Lewis $53m/4. The real problem is that Lewis didn't develop into a player worth that kind of extension. Tomlinson hasn't seemed great (19 pressures), but our very high pass volume is skewing that perceptions a bit when we're passing so much more often. Everybody's favorite guard Quenton Nelson has allowed only 10 pressures but that has been from over 100 fewer passing snaps.
C: Olu could simply be a bust, or he could be part of the cost of changing coaches. Olu and Williams had polar opposite spider plots and it's probable that Huff was looking for a more active player.
One of the reasons I think fans are too quick to jump at coaching changes is they undervalue consistency. There are lots of franchises that are always turning over coaches, the players on those teams often struggle, it's rarely clear if the players themselves are the problem or if it's that they've have to learn a new system every year.
RG: Christian Haynes was the #2 guard in consensus mock drafts and expecting him to be plan A isn't crazy for a rebuilding team focusing on the long-term. The problem is when this doesn't match with our target of winning now, as the jump from the American Athletic conference up to the NFL is enormous. His competition has been Anthony Bradford, who gave up 28 pressures last season including a rare 0 PFF pass block grade against the Eagles. That has been a glaring mistake for a team trying to be compete.
RT: The question with Abe Lucas is how well his degenerative knee condition was understood during the draft. Speculation is all over the board but I've yet to see any hard information about it. Losing Fant and then Forsythe as plans B and C is definitely unfortunate.