It usually takes a while for rookie O linemen to figure it out in the NFL. Indy has two guys in Nelson and Smith that broke the mold, although you might have guessed Nelson would.
My guess is that Beane already has couple guys targeted in free agency for the O line. I am quite sure they realize the O line needs significant upgrade, and will look more towards FA to get some experience in here. Should they use high round picks to build the O line? Absolutely, if they see a guy they think will be an All Pro type then go ahead and use a #9 on a G or C or T. Talent is talent; if you can add that level of talent in front of your young QB it would definitely be worth the asset. I just don't know if there is that level of talent in this year's draft, whereas there are a number of defensive front 7 guys that could fit the bill.