1° Dual gaz zones: small border 75%, large areas inside 25%
Technically easy, since an arena works like that.
2° You are not allowed to zone into, or out, a PvP zone if you have outside buffs (Essence, UVC, whatever). If you are part of a team, outside buffs are ok. If the team disbands, you are not able to zone out with a buff your current team couldnn't cast on you.
3° Put something of interest in the middle of the zone, like random objects spawning on the ground, like carbonrich rock does, so no new tek here. It could be NCUs, tank armors, or... pinky tokens ?
4° Don't allow anyone to attack or get attacked by someone not in his level range. A 75 character should have a range 65-85, while a 160 character should have a range 130-190.
The free for all past 75 rule is not good.
5° Do not allow teaming of out of range characters. In a team of 6, if the "middle" character is 75, lowest should be 65 and highest 85. This works now in Asheron's Call, so it must not be difficult.
6° Tweak the various classes after the new system is implemented, since it's not possible to tweak anything now due to outside buffs.
7° You are not allowed to exit a PvP zone while in combat. No new tek neither, since you already can't recharge/heal while in fight.
I for sure forgotmany aspects here, let's say it could be the foundation for a discussion