1. Not sure, rarely someones on to get a full room going which is understandable right now
2. I believe so
3. Yes
4. No, but spectators can see the chat
5. Yes
When creating a room, you can customize rounds, opponent strength min/max, fight rules, fight type, time limit, max health, player capacity, private slots and room name.
When you're in the lobby and select the lobby menu, the choices presented are start the fight, kick out, transfer hosts and change rules.