Probably been said before, but the lack of balancing sucks. But okay I can deal with that, I can deal with one team being composed entirely of high-hp top-geared players and the other being a bunch of people lost in the wrong tier, fine, okay, it's a challenge. And it motivates players to improve their gear.
But! There is no excuse for a lack of balancing upon a player leaving. It's crippling! Absolutely a death knell for the entire team. Especially when it's 4 vs. 3.
So I was thinking, it would be pretty sweet if when a player left, the remaining players got a bonus of some sort. Extra max hp, extra damage, and extra defense. Something like that. The spirit of the fallen empowers those that remain!
But to further help balancing, this bonus should also be temporarily applied to all teammates for any player who has not yet moved, to balance out the same team-crippling effects of AFKers.
That sounds awesome you say? Like it might very nearly solve the entire problem of how unfair a game is after a player has left? And all without reloading the instance to balance team numbers? Yes, yes I thought so. Thank you, that's very kind of you to say.
A better way in my opinion is to increase the team's capture rate. So if it normally a player's capture rate is 1unit/second and it takes 5 units to capture or nullify a control point, an X person team that is missing Y players all have their capture rates increased by at least 1/X. I would recommend increasing by 1/(X*c) where c is some balancing constant, because just having the capture rate of that player be redistributed doesn't solve the problem that the remaining players have less total health and damage output on average.
Heck, this could even be extended to gear as well: for each non-5* armor, helm, and single highest star-level weapon, you get a small capture bonus based on how far short of 15 stars you are. So if you are wearing full Dusker and have an Avenger and a Blaster, then you are short 5 stars (only the single best weapon counts), and you get some multiplier based on that number applied to your capture rate.