these are 2 things to make enlisted much better place. personally i quit whenever i get conquest or assault and sometimes detonation. also i quit on some maps that are just too bad for one side, specially with bad playerbase. and i am not alone in this. there are numerous times when i see players quit whenever they get some mode or map.
so what is the suggestion. give the players option to chose what maps/modes they want to play and adjust MM for it.
The game is not popular enough to support this currently. This is why events are limited to certain times of the day as the player base is to low to maintain it 24/7.
this has nothing to do with popularity. it is simple algorithm. if current match queue contains elements player doesnt want, create new match queue with elements player wants. you can make disclaimer that MM may take longer, so instead of waiting a minute, you put 2 minute MM.