You wanted to know what I thought of the new UI. It's decent.
I'd still like to see my current energy/mist though not just in the inventory. It can be small and unassuming just nice to know what my current mist is at.
also the option to move whats on the bottom to the top and vice versa (flip UI) would be very useful .
For me, I would like it if they would have an option that switches the Old and New UI. Its harder to check my health now when its at the top of the screen and the shield bar makes it significantly harder. I would like it if they did have an option for it, or atleast be able to put your HP on the bottom again, to make it easier to see. The rest of the UI changes were really good, except for this and the hit-splats on mobs are a bit distracting but theyre fine I soppose.
You said it's been suggested before, you've seen the threads, why not just pick a well-developed, well-supported one and post your opinion on that? The things you've said are all in other, more detailed places.