With the talent along the OL and injuries we can't possibly evaluate Ryan or him and Tannenbaum
Gase and Tannenbaum can ABSOLUTELY be evaluated by the play of the o-line, including with the back-ups playing. Let's go back to Parcells for a minute. He took Jake Long #1 overall rather than draft a QB in the first round. Before injuries took their toll, no one could question Jake's toughness and ability at LT. Under Sparano, they had a few turnstiles at RT, but the rest of the line was competent at worst. Guys like Long and Incognito weren't pushed around... they normally did the pushing.
Enter Philbin and his short pass based finesse offense with its accompanying blocking schemes. Philbin replaced Sparano's o-line with linemen who were more athletic and could execute his blocking schemes. Philbin did keep Pouncey, who IMO was more finesse and weak than tough and physical. Pouncey might have been athletic enough to get out and block at the next level, but he was also pushed around and knocked on his butt. Philbin's entire o-line was the same way; consistently pushed around and dominated by tough, physical d-lines. Their run blocking was poor, which didn't bother Philbin because he wanted the short pass to mostly replace the run. Their pass blocking was barely adequate on their best day; this is the line that allowed Tannehill to be sacked more than any other QB over a 4 year period. (Granted, Tanny was to blame for some of those, but still...)
Enter Gase for 2016. He also prefers a short pass based offense, and once publicly admitted that he had to tell his previous OC to remind him to run the ball once in a while because he'd rather throw it every down. So naturally, this new regime kept Philbin's o-linemen, including the two worst ranked Guards in the entire league for 2015 (Thomas and Turner). With the exception of drafting Tunsil in the 1st round (only because he fell to them), their (Gase and the Front Office) solution to fixing a poor o-line has been to sign over-the-hill or oft-injured veteran Free Agents, or draft projects. (Oh... and another 1st round pick on James, who is definitely not worth a 1st round pick!)
Philbin wanted nothing to do with tough, nasty, old-school type o-linemen, and together with the Front Office built a new o-line with the type of players that he preferred to execute his blocking schemes. Gase, liking a similar style of offense, kept those linemen, and brought in more as needed. So, why does the line still suck? If you look at the big picture, you'll see that the philosophy change from tough and nasty to finesse has resulted in a weak o-line. For the past 7 years under both Philbin and Gase, their o-line has been smacked around by tough, physical defenses. The problem appears to be either one of two things, or a combination of both: 1, the types of o-linemen that they bring in that are able to execute their blocking schemes are weak and just aren't very good, or 2, their blocking schemes are totally ineffective. IMO, an injured Jake Long is tougher, stronger, and better than ANYONE else that Philbin or Gase (and their corresponding Front Office personnel) has put on the line.
So, IMO, Gase and the Front Office built this line according to their specifications, they hand-picked each member and the back-ups, and they tell this line to execute their blocking schemes. They are 100% responsible for the poor play of this o-line. Miami will never improve their offense until they get rid of this weak finesse philosophy.