Hey, Do you find alot of similarity in between your older X1 an the Expo/IQ?
When we get a clean 6.5.3 on this phone, it will be a night an day difference, entirely imo, though I believe that to be true for us all, that use it that is.
With that said, I don't see any real bog downs on the phone now as I have mine tweaked, I still have older qualcomms an the difference is best measured in boot up time imo, 33 seconds versus 1:41 for my older ones.
Don't sell your phone, its like selling a Pet, can't handle it? Call the phone whisperer lol.
Just kidding, You got to do, what feels right to you for your uses an things, if its move it out, do it, if its, hang on and see where things go, do that instead.
Though we'd hate to lose a fellow as smart as us in owning this phone, so do hang an ride it man.