Personally i love the new UI functions so far, it more or less does everything i used addons for and in most cases even better.
However there is one thing ive really wished for ever since the UI changed back when dragonflight released. They really need to add the function to hide an actionbar but have it show up when you hover over it, and please let us hide actionbar 1.
i really want to use the cooldown manager and stuff, but i feel like my screen gets way to oversaturated with unnecessary information when i have 5 action bars AND the cooldown manager showing ontop of everything else