Great post, good analysis, except you didn't take into account what Kubiak wants to do. That isn't going to change. We don't have a 330 lbs center now, simply because Kubiak doesn't want one.
You started your discourse talking about Schaub's weaknesses, and how the OL doesn't complement him. Yet a few posts earlier, another poster lays out a convincing argument that Schaub & this OL works well together.
If our goal is to try to figure out what Smithiak will do to "fix" our OL, we need to address what they may believe the problem to be.
Personally, I would like to see "better talent" on our interior line, but I don't see replacing more than one piece, unless we get a guy like Kuper, then I can see 2 new faces at the most.
Unless you think it's just coach speak, I think Studdard is safe. Kubiak likes the guy. Brown is safe.
I wouldn't do it this way but I could see a trade for Kuper and Caldwell starting at the other OG position. This would be an upgrade on the OL. IMO
If it goes down like this Dwyer should be the no.1 pick.
I would draft Iupati in the 1st rd if he's available. Then a RB
Iupati is the best OG in this draft and has a chance to become a pro bowl type guy. I like him more that T.Williams and Okung for the Texans needs.
I can see him moving Caldwell to Center. Kuper at RG... but that's about it.
I've been bothered with Kubiak's affinity toward Studdard. However, as long as he's seen as depth and not depended on as a starter I won't be too critical. I've been livid the past two seasons when he has made the 53 man roster. That being said, he played much better this season than I thought possible.
Regarding the size issue on the interior oline, Caldwell is on the hefty side for an NFL center and was drafted to play that position. Remember, also, that the first lineman ever drafted by Kubiak was Charles Spencer. He was a giant human being and they were immediately excited about him. All these undersized guys were picked up in late rounds or as UDFA. So, I see no real indication that they want undersized guys. The reality is that when they are filling out their roster and they have limited players to choose from, they will pick an athletic guy over an overweight plodder. Ideally, they want a physical lineman with size and athleticism... ie: Charles Spencer, Winston (drafted to play guard), Caldwell, Duane Brown.