I don't think ANYONE we take at 29 is going to start this year without an injury issue. We have no holes. Even if we get the offensive playmaker you speak of, doesn't mean he is going to start at all. By takig Iupati or Pouncey, they could immediately upgrade the backup at every single OL position. Plus, look at all the playing time that Hunter got last year as the 6th lineman, its not like he is going to rot on the bench.
Plus, I think we have been tremendously fortunate that we have basically been injury free on the OL for the past couple of seasons and with Woody's back, I think we should have a plan in case we are not so fortunate this season.