actually subs wouldn't be great just because of the boosts you will get on your char. That's why they bringing the old days stuff, a server w/o subs like back in the day.
Should adjust the xp zones somehow, now if you tp and try to kill the mobs that are there you're struggling to kill'em. E.g. Human Wizard lvl 21-22 tps to the xp zone lvl 40 and you just die from mobs cuz they are resisting attacks