Planeswalker deck count limits
The game's meta would be a lot more interesting if decks had a cap or limit on how many planeswalkers could be included. It's boring, time-consuming and just plain not fun to play against the same decks that drown you in planeswalkers. The current meta rewards a brute force mentality that requires very little thinking or talent by the player. Banning cards isn't the only way forward.
By enforcing a limit on how many planeswalkers can be in a 60 card deck, the decisions to be made would make the game much more fun and interesting. Having play tested this with paper (with the limit set at 4 total planeswalkers), I can say it's made our games much better overall. The meta of Arena is already so narrow, anything that can be done to force more variance in deck building should be considered.
