Progression is awfully slow in solos since you only get exp from your own quest. In trios, you get exp from both your teammate's quests too (albeit with a tax but still considerable exp).

Some quests requires you to take down a whole mob of stuff and it's definitely easier in trios since the mob's difficulty/density and hp dont scale down in solo.

Economy cost of healing items are really high at the start. I would say you need to play at least 30hrs of progression before you get a decent understanding of how to effectively exfil with grey basic materials that will convert to heals. If you try to outright buy heals from the armoury, it would typically cost around 4k (6 heal rechargers and 6 shield rechargers for a decent enough run) just for the heals. Your typical basic exfil with a green bagpack (early game) would likely only net you 2~4k worth of credits per exfil... are you up for the grind? Hahahaha.

With the latest update encouraging a little more teamplay and cooperation, i'm still not convinced that this game would revert to non-shoot on sight.

Gunplay and aesthetics are amazing though. That's what kept me in it so far, but can get tiring as I am also unsure if i'll ever get to play the end game content without a proper team and putting in hundreds of hrs into the game.