MSQ

[Seraphor]

Ya know, when I sign up for the MSQ roulette, all I get is two 8 main raids? Despite the whole plethora of MSQ groups I've done?

Because that's what MSQ roulette is for. Specifically those two 8 man raids that are unlike anything else in the game and yet required for progression. They can't lump it in with anything else, because otherwise you'd hit a roulette expecting a 10 minute trial or a 15 minute dungeon and instead end up in a 45 minute raid.
You know what you're signing up for with MSQ roulette. Don't want to do those raids, then don't run MSQ roulette?