Personnel wise, I would resign Tyron, draft a tackle and a center with the first two picks in the draft. The new tackle can play swing and/or compete with Steele for the starting RT spot. Sign a couple of cheap but functional RBs in free agency. If you draft a guy, great, but it's not necessary.
Schematically, you have to bring in fresh blood, because the guys in house just don't have it. Darrell Bevell is part of the Dolphins staff and has ties to Dan Quinn, if we're looking for someone with connections to the current staff. Klint Kubiak is looking for an OC job. You could probably steal Kafka from the Giants if you wanted to make Daboll's anger management issues even worse, lol.
Honestly just pick any young up and coming guy from a successful scheme and let him cook.