MMBKIN remains untouched as of v6b, so I'm going to put down in writing that the team spawns here are pretty one-sided towards Wily.
Light's only reliable path forward is down into the lowest elevation area onto the entire map, which they are unable to escape from without passing by at least some of Wily team by taking the stairs near Ice Wall. Their access to mid is either through the sightline-blocked drop down near Proto Buster, or down the hall and through the narrow door on the north side. If they want any sort of high ground, they must go north through mid/low ground, jump up a staircase to reach Flame Blast, then go through another chokepoint (either the one they are likely being shot from through, or the one closer to Remote Mine). Since the map is small, it is likely an aggressive Wily player will already be there and ready to punish their approach.
Wily spawns on the highest point on the map, and can easily reach as far forward as Pharaoh Shot and Remote Mine in the time it takes Light Team to gain any ground. Map control becomes effortless for Wily because they already have access to the largest sightlines on the map.
This is a proposed solution that would rotate both teams around the center, putting Light closer to Flame Blast and Wily closer to Dust Crusher. This is a slight nerf to Wily and a big buff to Light, but should put them in relatively better playing fields. Wily now has to jump up to reach and claim their previous highest point (but still have access to all the perks that area comes with!), but Light has more immediate access to both the higher and lower layers of mid as well as a safer room to play from in the Remote Mine area. If Light puts up an amazing offensive front however, Wily will have way more room to duck and leave than Light does currently, as they can safely move through not only the lowest channel but through lower mid as well.
Cossack and King spawns are sort of an afterthought here. Adjust as needed.
And since MM7SHA also remains untouched, I've gone ahead and added a visual to that post as well detailing what I'd do for a v6c edit.