I don't like how annoying it is that everything is above all windows anymore than anyone else, but nothing can be done about it. it used to be below the inventory window, and that caused even worse problems with other windows.
we're limited to use "Overall", "Overlay", "Hud", "Hud.Menu" and "Under" layers. i've tried all of them, and changing the layer from "Overall" or "Overlay" to anything else will cause all raid windows to go behind chat, hot bar and metabolism windows should any player decide to move a raid window there. then they wouldn't be able to interact with that window anymore.
if i leave it as is then you can't interact with the game window that's being covered up. this isn't a problem because you can move the raid window wherever you want. you cannot move the game windows. so it only makes sense that raid window be able to be moved at all times.
when a better solution is available then it will be implemented. anyone who tells you otherwise should be ignored. they don't know what they're talking about.
none of this applies to the buyable window however, because it enables your mouse cursor. this is key to understand for anyone reading this. I will set the buyable window back to Hud.