I doubt we're seeing that now. The RP servers filled up first because there were less of them. Why would someone go to an RP server if there was a less occupied non-RP server available to them? That being said, I've yet to see any RP... but without chat bubbles I may simply be missing it.

It comes down to playstyle. Either one is valid, depending on your preferences. I like RPPvP because I like having large-scale PvP battles between factions that are based around RP story elements. Some people don't like PvP. They don't want to deal with wPvP situations. Or they want to be able to go out and about and RP anywhere they can without being interrupted by other players. Those people are there for RP just as much as people on RPPvP servers, they just don't want to RP combat situations. There definitely isn't a right way to RP vs a wrong way, or a better way overall. It all comes down to what the player wants. To say that one specific way has more merit over the other is a fallacy and ignores one of the primary aspects of roleplaying: respect among players.