Balancing and Netcode aside,
I'm salty they don't make everyone have the same hitbox instead of making female characters behave in a special way making some combos connect while other don't. It's just one of those things that will always bother me and it's a taint on the game for me that I'll never be able to get past. NRS doesn't seem interested in fixing that so I guess it's a feature to them while it's a turnoff for me.
The faction stuff was really a waste of resources. This was supposed to make people want to go online and bring the community together, but instead it's just something everyone ignores. Instead of the default rooms being named after the factions, they should name them after the different regions, like US EAST, US WEST, ect. Way easier than having to go on there and make one of those rooms and wait and wait.
Back dashing feels pretty weak. I KNOW it can be a very strong tool sometimes, but with the amount of forward moving strings it just feels weak. I really wish it would get longer invincibility frames, I feel like this would make back dashing a strong tool that would open up a lot of strategy in this game. With how much pressure there is in this game, I think a good defensive tool like a strong backdash would mix things up in a good way.
Some variations are too similar to each other. Reptile gets one move difference between them. I was excited about the variation system because I thought I'd be able to play my favorite character in many different ways. I still hope NRS will go back and add some more differences and buff the useless stuff.
I love most things about this game though, I think it feels really solid and can be a lot of fun. It's my favorite fighting game, but it still has its fixable faults that I'd like to see NRS tackle. And I'm really hoping for more DLC including iconic MK characters. Ninjas and Robots plz.