Removal of ITT
ITT is easily the most popular thread in the entire forum with over 17,000 replies and almost 500,000 views. At first it would sound like a really bad idea to remove such an active thread, but I think it would benefit the forum a lot. Removing ITT would potentially create new threads again. Sure, you will lose a place to talk about t- oh wait, there's an entire subforum for it! Remember, threads in Off-Topic doesn't need to be A+ quality. That means you can post about your Sunday meals in a new thread. For chit-chat, we have IRC but people never seem to realize that. Killing ITT will be a bit painful experience for some, but it's only for the best. This is the most essential change that needs to be done.

Stopping Necromancy Game
The second most popular thread in the forum is zini's awesome necromancy game. Over 9,000 replies and almost 250,000 views. It has come to the point where people just spam random letters like ccc and ssss ffffg aplll nonstop. Give some air to other forum games that are out there. The game has been running so long either way and I think it's time to announce the winner and title them as the biggest spammer of all time.

Removing Lewd subforum
This doesn't affect activity at all, but might as well mention it. It's dead, pointless and waste of frontpage space. If someone really needs to post something lewd outside of the subforum, just spoiler and tag it as NSFW or something. Also removing Lewd will (hopefully) make us forget about Khelly's dick.

Combine G&R with Other Media
I found myself saying this last year and it still seems like a good idea. Combine two inactive subforums into one as not many people here play osu! either way. If the activity increases from osu!players, we could just try making a subforum for the subforum.

Removing Art subforum
Also move the most active threads (Game Art and Brian's personal picture dump) in GD. The subforum barely has any activity going on and it's a good enough reason to do a change.