PvP suggestions to improve

[Genz]

1- players take a long time to die

No

A good burst can basically one-shot a target, and a lot of Feast is about preventing the opponent to do this good burst. Players easier to KO would just make Feast more shallow (some skills would become less useful, jobs balance would be more friable)
If a Feast game happens to feel slow, it would be because of weak dps in unranked, not following the countdown (or not doing any countdown at all)

In Frontlines, the weaker players are KO 5-10 times per run already, don't need to make it worse.