How does this remind anyone of an arena shooter? I'm confused.
if you've actually played modern FPS games, you'd know that they're a lot slower and not at all vertical like this game. The jump button is more like an obstacle in the typical FPS, especially in CoD and BF.
In this game, not only is jumping useful, it seems to be necessary for survival and is only one of many agile maneuvers. Another thing you might notice is the importance of switching between an assortment of weapons that are attuned to dispatching either a titan or pilot. Both of these things echo some of Quake 3's core concepts like a wide variety of situational weaponry and its emphasis on player mobility.
If the most modern FPS you've played is TF2, then maybe fast movement speed and weapon variety isn't all that novel to you, but know that
TF2 was the last time a multiplayer FPS did those things, and it came out in
2007.