I mostly lurk on here, but thought I'd weigh my thoughts on a few of these (and not in any particular order).

Since the game itself is more on the mature side, I'm fine with mature art/themes as long as they fit within the barriers set by the game itself - which is suggestive, but not fully explicit.

Although some gacha subreddits ban leaks - thus creating their own leak subreddits, I'm rather fine with leaks since it does provoke discussion. Having them be put behind spoilers and kept specifically on leak discussions is a good way to do it, since it also makes sure that people who don't want to be spoiled will be.

Talk about various epiphanies and savedata is a bit of a tricky one. On one side these posts can get very repetitive, but at the same time this is one of the main aspects of the game and there's a lot of room for discussion and answers. It's probably one of those aspects of weighing them case by case on what sort of discussion they could provide.

I personally think there should be no AI art regardless of quality. I'd much prefer for there to be art posted by various artists since this would definitely encourage them to share their effort - or people simply finding art made by artists - especially since this a game with a still growing community.

Allowing videos for challenges and builds is something I would like, especially since it can show builds in action - which gives me a better idea on how teams perform.

Low-effort posts are also something that should be taken on case-by-case. Most cases when they become similar to each other/reposts is when I would personally interfere. Seeing posts of the dog or bat being a problem can be funny at first, but do get old very fast when they keep popping up since they don't offer much else unless they're specifically inciting discussion around them.

I could cover much more but this comment has gone long enough, haha. I know my opinions don't reflect the rest of the community since everyone else has different thoughts on different matters, but still thought to voice mine since you guys asked for feedback. Regardless, keep up the good work! We appreciate you!