I get what you are saying, i used to had 80-90 ms and now its 165-200 usually. Its huge difference.
Is it unplayable? maybe not. But when you are facing good pvper and his ping is 50 and yours 150-250 than it becomes unplayable. Why would i loose to someone only because his internet connection is better in a game i pay to play?
For some time pvp was gear and aa dependant, now we can ad latency to it.