Tribes was just as much about freedom of ability (able to be effective wherever you go regardless of armor/loadout) as it was freedom of movement. People get all caught up in skiing, but I really do think when people play T1/T2 they take for granted just how much POWER you have in those games.
As a light in T2 classic, I am practically god in terms of options. The ability to burst down slow moving targets with mine disks (aside from shield HO anyways), the ability to instantly project damage long range (sniper rifle), an incredible short-mid range tool in the chaingun, and the overall versatility of the disk.
It's not just about being able to go anywhere and fly wherever you want. It's also the fact that your only limiting factor is your skill in regards to who or what you can engage. Go anywhere, do anything. On a base theoretical level, a two weapon fixed loadout system that tries to put people into niches just can't accomplish that. And that much is obvious from just publically released info :\