This definitely qualifies as "heavy meta". :) It's a larger comm that's been around for a very long time (since S1), and has a nice readership. I've never run into any major wanktastic issues there. Your meta doesn't strike me as contentious in any way whatsoever and your tone isn't accusatory or self-righteous (which, I think, sometimes can inspire wank more than what's actually being said), so I'd be really surprised if anyone started giving you a hard time. Of course, posting elsewhere is entirely up to you. You have to feel comfortable inviting people to your journal and it can feel intimidating.