I think so, cuz I never see anyone else doing it.
If you recognize what mission you’re doing, look for ways to do objectives early.
For example, there’s plenty of destructible objectives like radar beacons, computers, generators, etc… you can destroy these before it’s necessary to, saving a ton of time, and sparing yourself the pain and frustration of relying on others.
Theres also NPCs out in the open ready to be killed before they need to be. While your fellow spuds are eating crayons and digging through dirt in the train wreck, go to where the group of npcs are and take them out early. If you know what’s next, think about getting a head start on it.
No, fireteam missions aren’t too short already. I won’t be happy until we just do a flyby in the chopper and collect our xp.