This. Plus 1000%
Both came in as raw project players. Both have had some highs, and some truly low lows. See 3/4 of Tanny's games against us the last two years, and I see a very unpolished QB against a lights out defense. But then, you had him do just enough to win last time.
I'm not saying either of them are HOF QB's. But I want to see what EJ can do in Roman's system, which already was built around an athletic QB with accuracy issues but better than average mobility.
EDIT: It should also be noted that, at this point, Tannehill has 3 times the number of starts as EJ. It's funny how a raw, unpolished QB gets better the more he plays, isn't it?