Better idea: Summer beta player pool.
You may not realize it, but the Summer beta was a 100 times better, because the player pool was a 100 times bigger as well.
Both horrible ideas, removing a game mode entirely will cause for a lot of backlash, like how hardcore was removed. And putting it to a vote is just as bad, not everyone likes how it plays, so if this were given a chance to be voted for and won people might just quit right away and vice versa for those who like the settings.
Adding stuff like this just isn't possible in a game thats +1 year old and has a dwindling playerbase, sure it would be no problem if we had 200,000+ players, but I doubt we are barely breaking 20,000ish atm
Playlist? The amount of removed features (and changes for the worse for the most part) from the summer beta can't be put back into a single playlist. They didn't even brought the summer beta patches to the full game! Why isn't your name highlighted on the scoreboard in a match anymore? It's like they build the MP part from the ground up again and the summer beta code got lost in a hard drive crash. I'm not even joking, I really hope that's the case because most changes don't make any sense.