might be a huge nitpick but when you transition between menus (from main menu to hero gallery, etc), the black background is low res and does not have VFX on the sides like the challenges screen, which is also a black background.
all these backgrounds also do not have transition animations even though there is one existing (when you right click on a custom game lobby in the custom game browser). there should be one for when you go into the role select screen for example, like how it was back in ow1.