Thank you for the feedback!
I added the physics drag because without it, you could get the asteroids moving super fast when you threw them which made it too easy to hit the AI before it could react. However, I probably could have made the throwing feel less sluggish while still having a speed limit if I had used a more custom solution (Maybe no speed limit outside the arena, but immediately slow the asteroids down as soon as they enter it? Maybe only apply drag above a certain speed?). If I had more time to playtest, that is something I would have experimented with.