Contained is really design and build with competitive play in mind so this doesn't surprise me. I can imagine it being a bit of a boring map for...
Dedicated servers. That's pretty much it. Grifball gets ruined by p2p connections.
I think complaining about hitting something while jetpacking in the mancannons isn't really reasonable. You're not supposed to jetpack right after...
I think a Sword or Shotgun (I assume you mean these weapons) would only encourage camping. I purposely put a Sniper on the map because it can't be...