Every idea has their Pro's and Con's. Of course is warping around to avoid his death is quite annoying for the opponent. But a "10sec warp block" is also annoying for Farmer. Some would say now: "only enable that warp block for for_fild01". Thats even my opinion too. Fly Wings would grow on popularity then, which continues in other suggestions to nerf them. Maybe, who knows?
Also an idea would be for the PvP Room, that Poison bottles would still suicide yourself but granting the kill to the last enemy that hit you within the last 10 seconds. Otherwise its only a berry & seed waste in the PvP Rooms. If you are low on Seeds or Berries you just drink a Poison Bottle, and you are out of the PvP room with granting your opponent a Kill.