I agree wholly in regards to the UI losing its particular charm that made the game unique and iconic in a sense. I don't think I enjoy the transparency choice that was made for the new menu (almost like Microsoft UI). However, while I do like that its mostly consolidated it into a single window and having a customizable quick menu bar, I'd rather they somehow differentiate certain menu tabs for ease of accessibility.
Most of my contention especially is toward the new font they've chosen for chat box, NPC dialogues, and equipment tool tips. It appears to be a bit too choppy and if not slightly eye straining in my opinion to the point I've had to increase the font size for chat box to be even tolerable. I sincerely hope they could plan to implement additional font features on top of additionally adding/changing the current font colors it's well overdue for.