Yes, in a heartbeat... IF I could count on RP being enforced.
Sadly, that's the gotcha. You cannot enforce it. Sure you could technically create a place where a majority of RPs could go, but it would still be an 'open server'.
I guess, the point about paying more *could* stop people who really were not into RPing going there, I mean what would be the point of carrying on as normal if you could do it for $5 less a month on one of the other servers.
That said, if they added any more content, had events, special zones, or anything else that WASN'T on the other servers we'd get non-RPers on the RP server just because of the extras.
Bottom line, yes I would pay extra for BOTH my accounts to RP.
Lynn