In my opinion, quickest way to stabilize and improve the OL for 2017 is to move Saffold to LT (upgrade over Robinson), sign the best available center or guard they can in free agency and then use their 2nd or 3rd round (38th or 69th overall) pick on a really experienced C/G (whichever they don't sign in FA). Brown and Havenstein remain starters and I'd have Wichmann and maybe Barnes as the top 2 interior backups. 3rd OT TBD.
Perhaps then they're in the market for a 1st round LT in 2018. Maybe, maybe not.