its fun but gets repetitive.
how about have rounds so that every round you can cycle out weapons using a projectile-based weapon randomizer so its not just the same four weapons hours on end.
i suggest cycling kaje's sniper rifle, rocket launcher, and spear with the rest of the weapons you have there. Also, consider adding booster spawns in the surrounding halls/center arena for quick escapes, and/or jump boosters in those corners people get stuck in.