WARNING: Don't Blame Gailey for the ultra conservative offense
First, get ready to watch some of the most boring, conservative offense an NFL team has deployed in decades. This is going to set football back by fifty years, but don't blame the OC, he'll just be playing the hand he's been dealt, namely a QB who has a chicken wing for an arm.
When you have that kind of QB you are severely limited in the things you can do. There's a whole host of plays you simply cannot run for fear of turning wounded ducks into INT's. Unfortunately most of the stuff we can't do is the stuff that equals explosion plays, so you are basically looking at a boring, methodical offense that requires 12 play drives to score TD's and mostly settles for a lot of FG's. Three yards and a cloud of dust, screen passes, dump offs etc., the stuff that can put most mere mortals to sleep, and, sadly, the stuff that is real easy to defend once defenses discern your limitations.
Just think back to the Chad Pennington days, post arm surgery, and you'll have some idea of what to expect, only Fitzpatrick is not as good as Chad, but schematically it creates the exact same dilemma. The good news is, it can work verses poor defenses, occasionally we can dink and dunk those teams to death as we did with Pennington, but don't expect much success verses the better defensive teams, for those teams not having to cover the whole field is like taking candy from a baby, and don't expect to win high scoring games verses the better offensive teams.
Basically we still have enough to beat the dregs of the league like Cleveland in the home opener (God help us if we lose that game), and we still have enough to compete with the other mediocre teams, but this offense will excite no-one, to put it mildly, and we are not equipped to compete with teams who are in the upper tier offensively or defensively.
That might change if and when Petty is ready to takeover as the starter, or if Geno somehow bounces back from this debacle, the former being far more likely than the latter, but so long as Fitzpatrick is the starter, this is going to make Martyball seem like Air Coryell.