I totally agree with you. I love this game as well, and I love PvP, and I wish that a lot of the issues would have been resolved. Unfortunately, I know that the below problems will never be fixed, so I've already unsubbed.
Here's the problems that I see:
1) Look at the first couple of pages of the PvP forums. Some of the threads include: It should be harder to 2v1 someone, several different premades are evil threads, someone having trouble clicking a medpack, several threads on how evil stealth classes are, and so on. These are the top tier players now. 99.9% of the good player base has already left. What you have now are people that think they are good, who would be globbaled by people in the past.
2) The indifference of the devs. They know what makes them money. Casuals, PvE, and the Cartel Market. Why waste money and man power to make a new warzone map, or to fix rated 8v8s when they could dedicate that time to reskinning an old mount and putting it in the CC market for 2k CCs?
3) The hero engine. Unless they completely code the game for another engine, you will still have game breaking bugs to deal with. Also, no cross server which would really give a big boost to the community...especially in the rated scene.
That's just my 2 credits.