In entity views, the new collection views are great, but the (hidden until hovered) menu for the sub-view takes up a a lot of space:
I would much prefer if those menus would “pop up” when hovered, so they do not need to reserve so much space, which is then not usable to display the name of the relation field.
The “view selector” could also be hidden until hovered - it could become part of the larger menu which is invisible until hovered.