One thing I’ve always wanted is customisable friendly matches. The current selection can be fun but is limited and the only things you can modify about it is the arena you play in and if you want to play with “fixed deck order” or not.
My proposal is to simply allow you to mix and match game modes and modifiers. You’d simply select a game mode and then add as many modifiers as you want.
For example, I may choose to play the triple draft game mode with the sudden death, raged arena, and 7x elixer modifier combined. Or maybe I will play touchdown with the sands is healing modifier and the evolution bonanza modifier. This gives people much more freedom in friendly matches to tweak the match to their liking. Maybe even allow them to set the health of the princess and king towers and the duration of the match or when double elixer and sudden death begins.
Another thing that has been requested most likely a multitude of times is to use super troops in friendly matches. I don’t work as a programmer at supercell so I don’t know how buggy super troops will be when interacted with in weird ways or even result in a crash, but if they’re stable, it would be really fun to be able to use them in friendly battles.