A different room with this ruleset applied is better than having on pvp room change, as this will let people who enters know they should already be prepared.
Making this room an hourly event only makes people know what time to gather, fight, and get the system points (like BG HH time).
Having the room have a limited opened time and cooldown might help the kill abuse get the reward thing (1hr event and if you die x3 you will have to wait for 2-3mins before entering again).
Im ok with if the support or non-dps get a points even if no kill as long as they are on party. But add the point deduction system for every death everyone has.
If one of your party member dies you get deducted too. Probably if solo player against party more points the he/she gets but same deduction points.
Limit of max number of party members (3-4?) so as to not have 12 vs everyone on the room.
You get the accumulated points at the end of happy hour of the room and all of you will get kicked out (like after every game of BG).
As much as possible I want pvp room to stay as is. I do enter there sometimes to test with equipements/bg foods than having duel/leave on town.