This is the pattern, the new mode kills the old mode. Slaughter killed Secure, Seal Rock killed Slaughter, and now the Feast is the focus for most people. When 4.0 rolls around, I imagine we'll get a new mode (nobody expects a new mode for 3.x, right?) that'll knock the Feast off its perch. Surprisingly 72 player Seal Rock is still a go on Primal, but I was able to get this only once last night.