The only bad thing about dead Wolfs Den is Ravenous Wolf and Alpha Wolf titles are practically unobtainable till servers shutdown. They should have united them with The Feast achievements, I bet some players have 5k matches/wins there and qualify, yet the top achievement for The Feast is only 1k wins.
They are dropping Frontlines and possibly The Feast in 4.x for new type of pvp they are working on and their achievements/titles will be realistically unobtainable as well as nobody will bother with old modes aside from some short-living weekly event. Everyone will spam lv70 PvP and will not look back.