I have a 2016 Limited and would like to get the GX next.
GX overall is just more to my liking. It drives better, amenities/features/trim is nicer, I enjoy the V8, and I also like the Torsen based 4WD system on the GX/Limited/4th gens better. It's just a more versatile system for use in all conditions.
I'm just holding off for some type of infotainment update. As soon as Apple Carplay is is available I will make the switch. No rush for the change, it's more of a want than a need... the 2016 is still holding strong.
I still off-road, but I don't get a crazy as I used to. It's getting to the point I dislike driving around a heavily modified rig for the 1-2 camping trips a year I go on now. I'm actually starting to miss having a well performing road truck for the rest of the time.