Lot of replies to this post here, so just gonna reply to people “generally.”
Ignoring the anti-cheat side of things for now, I can say that although Unturned likely won’t be getting too many updates regarding server tools, Unturned II plans to have significantly better tools for admins (and will likely be the main focus of August alongside the other server-related things).
I believe a replays feature has been mentioned for version 3 before, but isn’t realistic due to issues with the core framework of the game.
As for other administrative tools, I am unsure whether or not Nelson would choose to add them. If they were to be added, I’d say they’d likely be added around the same time Unturned II gets server tools, either before (to see how well they fare in Unturned) or after (as a result of having a good idea as to what Unturned could most benefit from).