-Same Manes between both models: OH YES YES YES. I have a few characters which I'd actually like to use a full mane for.
-Eyes: I agree :3 Or different colored eyes would be cool too.
-Paw Pad Colors: Sometimes the brown pawpads look TERRIBLE on certain characters, like black wolves. I'd love this if we could choose the color.
-Multiple Tails: Well, I know there is already the nine tails item in the Pawsome Item Pack, so I can't really complain about not being able to have two tails.
-Whiskers: Again, there's an item, but not to be rude to the creator they don't fit all too well. I think whiskers and with an option to turn them on/off would be nice.
-Facial hair: I've wanted this for a while! :3 Yesyesyes
-Mane Combination: I'm sorry but I don't understand what you mean by that all too well xD
I like these ideas. Would let you create a much more interesting character.