It’s been a while since I played Titanfall, but I remember it as mostly ground-based FPS. This video gives you an impression of Tribes 2 fights: https://youtu.be/Kj6K_d6Zsuw

There were also other roles you can’t see in the video (at least in the first minutes): there was an invisibility shield that allowed you to infiltrate enemy bases. You could set up sensors to make invisible opponents visible, deploy small turrets and radars. You could spend all game just repairing things like turrets, radars and inventory stations, and that was an important role in CTF. And there were vehicles that needed pilots, you could control turrets…