I honestly never thought about that process. I'm not even sure comments for suggestions pop up anywhere. Maybe it's time to revise that system.

there are similar bands to TPT already on MS, so...

I imagine all the prog rock that is on MS has not enter by the user suggestion route, whatever the reason, I'm glad they're on MS

That doesn't mean that decision can't be re-visited as far as I'm concerned. Unless a band is blacklisted for violating our terms.

Obviously we have to draw a line somewhere, but that's very much done on a case-by-case basis

well, it seems they've already been blacklisted

That's what the suggestion list is for. If a band has merits, you can make their case there. We're not trying to die on any hill just because a decision was made at some point in time.