Alright, I've got some ideas, and an anti-idea XD
1. A plain, striped tail marking. Even horizontal lines that stay the same for the length of the tail.
2. More areas, maybe that Ficho Tunnel leads to. I'm pretty sure this is most likely not happening, however.
3. More customization. Like, smaller bodies, and pretty much a wider range for everything.
4. In some IT videos from YouTube, I saw something like a walking in place dance move. I really liked it, it would be nice implemented into FH ^^ And if it wasn't a dance move, forget I said that XD
My Anti-Idea is... Wait, what? Whats an anti idea? Basically something that definitely should NOT be added to FH. More species. You can make enough animals with the felines and canines, why need more?