I'm against a new thread.
On the contrary: creating more Marvin threads would, in fact, be that same "polluting" of the forum that you wish to avoid.
Everything is fine as it is. Those MobileRead users who aren't interested in Marvin, can easily avoid opening this single thread.
If you feel you must blame someone for repetitiveness, then blame those posters who submit a feature request without bothering to check if it has already been mentioned earlier in the thread. Yeah, this is a long thread and not everyone has the time to plow through dozens of pages of posts, but a new poster might perhaps at least check the
last few pages before posting a request. Library folders have been mentioned pretty frequently here recently.
Also, there is a GoogleGroup mailing list devoted to discussing Marvin Beta versions. Apple only gives limited Beta-testing slots to Kris, which is why he can't satisfy all potential Beta-testers with Beta access. I don't see, however, why
everyone who is interested could not at least join the GoogleGroup. That way, you'd see what Marvin features are being tested and prepared, and you could chime in with your own suggestions.