I'm sure this has been discussed before, but I really want an event mode queue like PUBG has.

Lighthearted limited-time special events in Casual would be good for the community and for content creators. The playerbase is large enough now to support seperate queues without hurting the normal Casual and Ranked pools. Some examples:

Opposite Day

Attacker ops have to defend, defender ops have to attack. It would be an interesting perspective on the meta and a lot of defender gadgets would be surprisingly useful on the attack. Some things would be blisteringly OP, like Glaz on defense or Pulse on offense but it shouldn't be meant as a competitive or serious mode.

Barebones

Recruits only, players have to rely on good gunplay rather than gadgets.

Deathmatch

Self explanatory, same as CS:GO. Both teams have outdoor respawns on opposite sides of the map and can select any operator regardless of their team. This would only work for the larger maps but still very feasible.

Mistakes Of The Past

All weapons can take an ACOG, including handguns.