they can do huge things with original cast, Lighting.
As many fans have said, there are still many stories to tell, so Fox can easily tell at least one more huge storyline until rebooting.
I think we all get your points, but there's no need to rush the reboot. Let them do another huge movie after DOFP, and around 2020 or so Fox can move to another version of the x-men, if want it.
but again, they can do great things with the cast they have yet. So, lets be optimistic!
Next Big X-Men Crossover
* 2017- X-Men: Age of Apocalypse
Edit: Forget about 2017:
Official announcement -> X-MEN: APOCALYPSE - MAY 27, 2016!!!!