Fair enough, but i feel like weekly brawls tend to be generally more trying out wacky stuff.
In most cases they are. But I'm a big fan of Mobawatch.
For one, no hero stacking. Thank god.
For another, it forces you to commit to the choice you make, which I feel has resulted in players being more careful with their decisions and trying to maximize their characters utility. Sometimes you just get bad matchups you can't do anything about, but otherwise I think it's an interesting effect. I would be interested in a mode where there are a limited amount of changes you can make.
Lastly, no stat tracking. These games don't count toward the total games you play, so losing carries no penalty. I care about trying to maintain a good W/L ratio, but I don't like that I care. I don't play Comp partially for that reason, because I already feel bad whenever my W/L ratio in QP dips below 50%, even though I shouldn't. Having matches of absolute no consequence allows me to not feel guilty about failing a game because I'm trying to experiment with what works and what doesn't without it being a black mark on my record. Or it just makes me feel not guilty for failing a game period. And it makes me a lot less angry when I lose because of bad teammates. A game mode that doesn't record how you did is a major stress reliever for me, something I hadn't expected. The wins are as satisfying as always, but losses no longer hold any weight. It's a much more pleasurable way of playing imo.
If they just changed it so you could swap heroes, Mobawatch would be my official mode of play without question.