re: What do the Miles supporters believe it will take to actually develop a legit QB

No...Miles is not on the field! But it is Mile's responsibility to do whatever is necessary to "develop" a QB. Emphasis has totally been on the running game-go back and look at the stats for the past 4-5 years and check the averages....at best 30% passing, and 70% run, with a whole lot of 20% passing and 80% run.
I would suspect that "if" we were to recruit a high powered OC....that he would decline the offer!