Thank you for this thread! It's a great new feature but it has room for improvement. I agree whole heartedly with the ability to make the frame/background completely transparent. It would help it feel less unnecessarily wide.

The first thing I can think of is being able to pin it so that it stays visible(and possibly in one spot) until you click the x to close it rather than it closing with various interactions and use of the escape key.

It'd also be fantastic to have the option to change the shape/layout of the slots like we can normal hotbars. So something like 10x2(vertically and/or horizontally) or even just one long string of 25 slots that can be tucked to the top/bottom/sides of the screen. Basically add some flexibility in how we arrange it with the rest of our UI.

Lastly, allowing for a more expansive list of icons that can be used for the 4 page buttons. Unless I'm missing something, the icon for each panel can only come from the icons of items in the panel but, you can't use icons of macros. A popup like macros have with a bunch of icons to choose from(in addition to the right clicking a button in the panel) would be great.