Different strokes for different folks.
Randos aren’t reliable enough for me in GM2 and it’s still tedious at that level for me having to carry or revive so much. That and the increased health bullet sponginess of GM2/3 don’t make it worthwhile for my time.
The increased chance or increase in number in drops is worthless because drops are the exact same quality tier as GM1 so I prefer to stay there. If you’re already kitted out in MWs, all the blues, purples and MWs in GM2 are worthless. Everyone is just after legendaries. The extra trouble of extra hard hitting enemies and their increase health isn’t as quick to plow through.
GM1 for all my expeditions, strongholds and GM3 for freeplay. I’ve hateplayed this game a lot obviously. GM1s take 10-15min. GM2-3s take 30min + always unless it’s a GM2 HoR where everyone bails after furies.
I’ve slogged through GM2/3 strongholds and gotten a single MW. It’s a colossal waste of time.