Yeah fixing the power levels would be a huge step in the right direction! Lots of posts have suggested this.. whether Plarium does something about it or not is questionable.
Regarding grouping in tournaments, I had a suggestion that I feel would make it fair for everyone. It would help the lower scoring players without hurting the top scoring ones. See https://forum.plarium.com/en/mech-arena/702_game-discussion/1713932_improving-grouping-in-tournament-heats/ .
Yeah, any of that could help. And I looked a litte farther on the mods, I guess they do add a small amount of power.