The up arrow to change between game-modes/maps is unclear in its function. When I clicked on the button, I was expecting like a back arrow (or something to switch between tabs on the client not between game-modes). Maybe removing the line and making it look like a dropdown arrow would be more clear as to the role of the arrow and how to change modes.
This board is the best place to discuss the client with Rioters and your fellow players, although it won't be our main source for feedback resolution. Look to the other tools, like the Submit Feedback button in the client, for that. As always, please follow the Universal Rules and keep content focused on appropriate topics for this board.