You guys need to understand the difference between "group content" and "requires a PPU" content.

There is no such thing as group content in this game.
You want to do mc5 in a "group" without a PPU? good fucking luck.
You want to do bat queen in a "group" of 5 pistol spies? LOL
Oooh, how about running DOY tunnels as a group of 3 rifle spies?

Oh.... what's that? None of these are viable?
Oh.

Maybe this game doesn't have "group content" after all.

Maybe it's just "requires PPU" for certain things.

But then let's ask this question to the NST: do you seriously expect 33-50% of the population to be a PPU to do anything non-solo related?