You should forget psk, FBX is universal as many programs uses it to export models and animations from 3DSMAX to Blender, also the money given to Blender fundation shows that Epic consider seriously other software.
You have paid for an evolving engine like some early access, it is not so buggy as many people are succesfully making real games with it, new features and improvments coming each time. It’s lot better modern editor than UDK in many points, you should instead post your problems with UE4 that way people could help you resolve them.