It's just incomprehensible to me how bad the user interface still is. What's the point of placing icons in the hotbar when, once you glance away for a second, the icons reshuffle themselves? Why even have numbers as keybinds when every time I press a number, some different ability is triggered?
Also, not exactly an UI feature but related to randomly moving icons: stop changing my spells when my characters level up. The best would be to just have an empty new slots. Second best is if the game selected some spells into the new slots. There's absolutely no reason for this game to forcefully change my selected spells, removing the ones I've memorized and replacing them with different spells, when leveling up.