Guess this might seem like an unpopular opinion but I didn't mind the RahThreads at all. They mostly only got bumped incessantly either from genuine discussion or bc of people complaining that they were there. It seems like more of a meme that people have coalesced an opinion on rather than an actual problem.
The "flaws of 6s" thread became a pretty good conversation that lasted 3 pages of mostly healthy discussion. The "favorite tf2 player quotes" thread became a pretty good megathread/dumping ground for often funny or forgotten quotes and moments from tf2 history. The "how did you get into tf2" thread was kind of useless discussion-wise but was still a good outlet for people to talk about themselves.
There's not enough posts on this site overall for it to become spammy even if the posts were shit. I log in every few days and could easily see all the new threads in the first page, so I don't really see the big problem. It especially seems weird when there's site moderators in this thread telling u to stop making content for their forum.
Of course they could definitely be spaced out a little bit more just to give each thread a little breathing room, so as not to dilute or derail discussions, but I'd rather have daily RahThreads than the fucking barren wasteland that I first came back to last year.