The idea in its basic form sounds decent, but I just have to laugh at some of the things these two moderators are saying.One says regular players shouldn't be allowed to post replies, other one says they should not be able to post threads. Only reasoning for both being that they dont feel like cleaning up the forums. There really is no reason why either of these "features" would be any more necessary on the suggested forum than any of the existing ones. If you think mods should keep order by essentially making users ask permission to post so you can think about is the post worthy of being seen, instead of just removing/hiding the useless post I dont know what to say.
Enough ranting back to the idea. I think it would be better for it to all around guides. I know that osu is not a very complicated game so there would not be much need for guides outside technical stuff, but maybe a guide for pp farming or something i dunno.
Shit I have to return to my first point after all. So obviously replies should be allowed to be made. Do you honestly think that people would make so complete guides that there possibly couldn't be anything to add, or if someone has a question about something on the guide? If there is then it should be done via replies. I know the focus on guides should be heavily on the OP, but if that is such a problem for you, how about just not scroll down after it?