An edit to my above post is that in redshirting freshman, I was specifically speaking of offensive linemen.
I do believe that there is light at the end of this tunnel and in a reasonable amount of time (my guess is midpoint next season) we will not only be solid on the offensive line but in a position (with reasonable recruiting classes going forward) very good to excellent going forward.
Looking at the numbers we we be in very good shape (and a bit young) in size, depth and time working with both Foley and Balis next year. Granted this is assuming that we don't lose anyone who has eligibility remaining, which may not be a given where someone is behind a guy who is an underclassman, that Hashemi is returned to tackle (the Iowa method for years had been moving TE's to offensive tackle) and that we can move a couple kids around to balance out depth (including finding a third center).
Next year we will go into the season (not counting incoming true freshman) with sixteen offensive linemen (fourteen scholarship, but to fill out depth you always want a couple of walkons filling out the roster). If we bring in four kids this recruiting class, we can legitimately field a four deep, with walkons on the third or four team and all true frosh on the fourth team, minimizing the need to burn any redshirts. A big bonus to these numbers is that we will only have two seniors (Gifford & Nwokeji), quite likely neither being a starter and we will have at least six returning scholarship players projected at tackle.
We could conceivably start a RS freshman (Oak @ center), two true sophs (Crozier & Rutherford @ guard) and two RS juniors (Knappe & Levy @ tackle) next year, returning the entire line for 2016, working Hashemi into LT in the process to become a starter as (hopefully) a RS junior in 2018 while we move Rutherford out to RT at the same time (this is common with many schools, play a kid at guard as an underclassman to gain experience and move him out to tackle as an upperclassman) and move an underclassman to starting guard.
We need to coach these kids up (which takes time), we need to build their bodies (also takes time) and we need to consistently bring in four to five recruits who can be developed into starters but if we do pull this off, thirteen or so months down the road we will be looking at solid offensive line play for the foreseeable future.