well like you expected some of your suggestions were already discussed, some several times.

Here is what I know:

The fatigue system is going away, either the next patch or sometime in the summer.

the UI is getting revamped also, to what extent and the specifics I do not know, but I am sure the menus are getting addressed. The Action bars are also planned to be permanent (or have the option to anyways) and possibly the 3 bars at the same time so you don't have to circle through them.

Targeting, though it received several updates and fixes, I think they are still working on along with the battle system revamp.