Agreed. Tribes does it and the rest of the games need to focus on what they are good at. That said I hope the new vehicle system lets me powerslide into a base crushing tons of people.
If you're referring to Tribes skiing, no. That kind of mechanic makes it a very different game. The land for instance has to be molded with skiing in mind 100% of the time. There are so many hills in Tribes for a reason.