I think they'll give it A 2-3 year to build up anticipation like what they did with Spider-Man. The X-Men lore is just too much to fit on screen if that's the general consensus then it's more than welcome they take their time to get it right.
Nothing can be worse than the black biker leather clothes X-Men.
Or focusing on Wolverine and/or Jean Grey instead of Cyclops
Or only showing one of their most popular X-Men characters of all time in Bishop for like 2 mins in DoFP.
If they can make mid-tier level characters like Hawkeye and Black Widow household names then I'm sure Marvel will do X-Men justice.