I get that nerfing across the board is probably not feasible. I was spitballing. The higher Notoriety setting maybe? Or... There are settings in Trials to offer challenge, right? Maybe apply that mechanic to all teams as an option. Let team leaders set enh caps or turn off IO sets? I dunno. If that's been debated to death, too, no worries.
Part of the problem, too, is finding good teams for regular missions. Even if I were to organize them around my mission, it's not like I'd be able to vet everyone who responds to an LFG channel callout.