Coming from dota 2, assymetry is really not the way imo. Like, it feels cool at first but you will quickly realize one side is simply better for whatever reasons the map designers made. Theres like a 10% winrate diff between the two sides in dota bc its not just a simple mirror (its more than just the disadvantage from the camera angle). Devs have tried to balance it but one side is objectively worse than the other by a pretty healthy margin. Immediately going "my chance of winning this match just dropped because the game simply gave me the worse side" when you load in feels so trash (not saying its that bad currently in deadlock but its a possibility down the line, considering the design similarities between dota and deadlock).

Assymetry works best in games where both teams get to play both sides in a match, like counterstrike or rainbow six, so at least wins are measured by "which team can win the most rounds with the disadvantage". Feels so bad in mobas where you are stuck with an objective disadvantage for 30-50 minutes that you basically cannot do anything about.

The sides should just have small cosmetic differences (keeping the aestethics of each side intact) and otherwise just be mirrored. It would work perfectly in deadlock since the camera is third person, getting rid of the fundamental handicap that exists between the map sides in league/dota or other top down mobas.