I think there is already a mod for the day and night effect you might be talking about. I'm not sure, but I think I've used it before.
Anyways with your other ideas, although they are creative ones, and have been brought up before in some other topics, we can't add anymore actions along with the defaults cause Kovu is the only one that can do so, and he's been AFK for a year now. So any more actions that we do however come up with, it will be impossible unless we get the original files from Kovu, but he's not coming back and not talking to staff anymore.
You can however make your own emotes...but actions, I don't think so.
Pray would be amazing too but can't add them until Kovu gives staff the original Feral Heart files.