If I had an X I would not change it...why paying a new device and a new license for almost nothing? If the X does not satisfy you, maybe it's better to switch back to Android, the same phone could give you a lot more depending what you need.
I don't want to be pessimistic, but I am pretty sure that even the XA2 won't be bug-free.
This is Sailfish and I like it even with its few functionalities, since I am writing with a Nexus 5 with still SFOS 2.0.4
Nice to be part of this OS development, but not so nice wasting resources and playing the market game, changing phone once a year.