I think if you guys are not in favor of 3rd party add ons/UI Mods (which is fine IMO) then allowing player customization within the game to fit individual needs will be important. Allowing players to move and re-size windows will let players adjust the UI to their play style an d what they care to see on screen at a given timeYeah, I do not think we will allow addons. Not sure if it's something that really has been discussed in depth though.
I'm personally in disfavour of addons. I prefer when everyone play the same game.