Emilie (atys)
I could see a level restriction such as 150+ or 200+ zones (and all PR) for a limited period. This would mean the more junior players wouldn't be involved or griefed, if it came to that. A month is too long. It might be that a week is too long, but I could see a weekend or even a day might spice things up some, particularly during historically quiet periods like THE WHOLE MONTH OF JANUARY :P (no, I'm not sorry for the caps).
Emi
Scrapper (until I find a better title)
Something something of Asylum
Spice things up for some and make the game not worthwhile for others.