Isnt not buying next expansion so stay in you full epic pvp gear in lower level BGs an exploit?
I suspect we ve have all met the 1 man armies in AV etc - destroy everything or are unkillable by normal toons. Easy fix is to put lvl 60s in lvl 61-70 grp and lvl 70 into 71-80. They will still be realtively overgeared but will lose soem of the godlike powers against other players.