The problem with MushroomFleet is that there is too much shallow hype surrounding them; they've basically become Starmade's equivalent of Yogscast. They've become mainstream in a bad way. I personally think their "yhole" memes and whatnot are over-exaggerated, and not funny/entertaining at all. Having to skim through their long livestream videos just to figure out what's going on in the latest dev build is incredibly annoying, and it'd be nice if we had another source other than them.
I personally fell that MushroomFleet and Schine have basically morphed into one big entity, and meanwhile the rest of the community is considerably detached from what the higher-ups is doing. It feels like Feudalism.
Oh, and I personally am bored of all the British gaming personalities out there for indie games on the internet; I realize they're popular, but it's almost become cliche from my point of view. And MushroomFleet has a ton of that, so I don't like to watch their videos very often, because I can easily close my eyes and imagine I'm watching Yogscast or some other extremely cliche gaming channel.
Regardless, I have played with them before on livestreams in the past, back when I was still willingly a tester, and they're pretty fun people to play with. Although, the positions they have means they're often very busy, so you don't get to have fun with them much, because they're doing their professional-kinds-of-things quite often.