I'm really keen on the new loading screen; that feature was necessary. It could see an UI rework (in terms of tidyness and words size/font) to make it a bit more pleasant to the sight, but overall it's quite good.
On the other hand, I'd like to request adding the map Elongation into the 2v2 Composer hopper;
Even if it isn't properly competitive for some people, remember that we're not talking about Hardcore nor Ranked, but instead about Social, whose main purpose is offering variety and fun gametypes, but if it's not suitable for Slayer, at least add it into the Flag&Bomb playlist, where strategies are important, and boxes and/or jumps provide that kind of experience. I thought this because the current maps list is very limited and the size of this scenary makes it meant to be played here. A Slayer / Slayer BR toggle option is also elementary in 4v4, as many people have requested before.
In addition, I'd like to point out that there's still plenty of connection issues; it seems that 7/10 games hit detection and gameplay are extremely inconsistent and unfair due to the servers problems in Europe. I'd suggest to add an option to manually choose your nearest server, or at least include a ping rule that can be enabled optionally.
Finally, I wanna state that the situation balance hasn't improved at all; games are completely random and one-sided, and moreover, people quitting games and being AFK are still actual facts. So, to finish this problem there are two ways: either include a hidden rank into Social or mix Competitive with the Composer in a new way (which would also decrease the population issues). And a Join In Progress feature is a must nowadays, bans have improved but not removed the issues.
Thank you for continue improving MCC.