the rocket (now grenade) launcher's projectile is now affected by gravity to a degree, meaning you'll need to properly lead your shots when trying to hit targets at a long or medium range
it also has a new explosion effect reminiscent of older builds, where explosions would be just blasts of pure white. I thought this would be a nice change to help the gun live up to its name in-game (proxima centauri), since it's named after a star
there's also some overlays for being healed, gaining shields, or gaining ammo, because noticing such changes is difficult in the midst of combat