I think the people saying that Feast will die out in short order are massively underselling PvP's popularity.

Is it very big compared to the whole game? No. But there are still thousands of people on each Data Center who managed to play 10+ games a week of Frontline with how awful queues for it were.

Small-man pvp that doesn't take 40 minutes to fire is going to have legs for quite some time, especially with balance passes.