You do realize that many players enjoy both, and it's not about pvp vs pve. It's about that they release little new content on both ends, and that while many went to Crom for pve gear and the ability to take advantage of the population there, for those that enjoy pvp as much it becomes very dull on Crom as well without much world pvp. Believe when I say many that would be playing contributing to your raid population would still be playing AoC if Crom offered more to players who enjoy both, instead these players are in TESO now. Also don't forget many people who enjoy crafting, and TESO is a crafters wet dream.
They should be reaching out to players who enjoy all aspects of the game, not one or the other.