Fixing his back 3 would solve a lot of problems. I wouldn't be push blocking his OH teleports anymore, the delay makes that a common occurrence. If we could regain the ability to consistently B3 off of BGB's, that would be nice as well. While they're at it, they mine as well give us back the ability to just mash back 3 after a super. This strict timing bs is so monotonous that I just save my meter for meter burned hurricane bowsI don't really know what kan make the Martian match up better outside of game related issues like not switching sides fast enough to AA his instant air dashes with standing 1.
Fixing the hitbox on his MB B3 would definitely help, because right now while it's possible to MB B3 the teleport, the fact that you have to delay it makes it harder to the point where it's usually just better to read it. (Also, why does Arrow get like no damage kompared to others for F3 (even MB F3) into a kombo?)