Well there are a few RND servers that are useless or have a similar, and better gamemode, that should be replaced IMO.
First is Plain Build, it's extremely useless, and the only people that go on it are minges, it isn't fun and it isn't cool, therefore, it should be replaced.
Second is Winter Survival, it's a nice gamemod, but it can be very boring and annoying sometimes, fortunately, there's a gamemod with the same concept called Stranded, which is also about making your stuff and surviving, just more advanced, more addicting, more fun, more interesting, and much better than WS.
That's it, hope Coolz will consider this and that you guys will support this =D