I see your point, EDP before getting killed means no kills for you.. Some players do that
BUT, some players EDP so they don't have to log off and lose the time for the activity tokens (correct me if I'm wrong) Activity tokens are really important for some, so as PvP, and having to log off will mean +1 hour to get 1 activity token, and letting somebody kill you will mean +1 death to you.
I see in which ways removing the EDP effect inside PvP Room for other jobs will be better. But in other ways its just unfavorable.
In my opinion.. it's not a very good idea