https://www.reddit.com/r/Tribes/comments/3yeyyp/thoughts_on_groundpounding_movement_and_mods/cyd2m6u
Mods, specifically being able to set up new game mode styles, will only put up more divisions between new players and dedicated long time players. And, just like with the previous incarnations of Tribes, inevitably kill the community size to nothing and then game quickly after.