(Most of my observations are from Indigo)
1. Trading is free. The more PVE people realize this the more will switch. We do not need ABL's for anything but wings. Just go to a guild hall, turn yellow.. Pk drop item, Kill the "designated red toon" my guild has several, and go back to white.
2. PVP is not really PVP - Yes you can kill other players but Froggy took out the ability for white players to drop gear. Therefore.. players dont get rewarded for killing other players. = PK being on a massive decline. Even if someone Pk's you, you get a protective shield.. and you go back to doing whatever you were doing before.
3. Population is rising - This may be true on all servers, I am not sure. But my ,mediocre at best guild, is sporting almost full sieges every-night and we only hover around 1200 score. When i started playing bumping into other players was a rare sight. Lately I have been avoiding groups of people so I don't have to stop and chat.
4. Its a challenge - Since PVP servers are behind PVE server. There is alot to prove and the door is open for anyone to come make a name for themselves. Hell the first group to clear TOSH hard will be worshiped like Gods.. It won't be long now I am guessing, lots more people are gearing and replacing the hard-hitters we lost Chapter 4