What is even the point of dplexing? Someone sits in a stabbed frigate of less than 1m isk in a certain space for a while. It creates zero content because everyone just warps away instantly. Even if somehow combat does occur there are zero stakes because those frigates are the definition of expendable. It is an activity so painfully dull that doing it only makes sense for bots and multi boxers.
I say: get rid of it entirely.
Just let the contested rating decline at a constant pace. If you want to prevent a system from being taken over than kill the people trying to run offensive plexes. People don’t cap enough in the system? Rating goes down.
Numbers might need retweaking