Wood Nymph, Creeping Ooze, Phantom Soldier, Silvershield Archers, and Goblin Mech have already hit their cap and stopped printing.
Brownie, Imp Bowman, Sea Monster, Undead Minotaur, Exploding Dwarf, and Manticore are all close to their caps and I presume intended to be replaced by this update.
Epics were already slowest to print, and replacing four with six combined with the quartering of the print rate coming on Tuesday means these new epics are going to be in print for a VERY long time.