How awesome would it be for players to be able to create their own custom lodge as well as put any animal wherever they want in the lodge! I think it would be awesome if there was an option to either make your own lodge, or just customize an existing lodge. I so often find that there isn't the "perfect" spot for a trophy, and think to myself how great it would be to put it in a specific spot. If you were able to create your own lodge, I think there should be a limit on how many animals you can fit, but not how many of each class.
Another thing I have wanted forever it feels like are european mounts! This is where you can see the skull of an animal along with it's antlers if it has any. I hunt in real life, and all of my deer are made into european mounts. It would make me feel more at home, along with probably a lot of other hunters.
Lastly, I think it would be cool if turkeys had a new mount where it was only their beard, spurs, and fan. I mount my tom (male) turkeys this way in real life along with many other people.