We considered ranking the people before we thought of ranking the RPs when we were implementing the tiered system. The reason we didn't try ranking the members is because, like everyone ie saying, members of any skill level may feel left out one way or another - and because maintaining every member's rank would be a nightmare for moderators.
I can see now how a tiered system of any kind would do more harm than good. Active role players will start to know the other role players and start to know who has more skill. They know that just by being involved. I can attest to this and I'm sure lots of other role players can as well.
So, we bring activity up by making it fairer and more enjoyable for everyone and easier and more welcoming to newcomers. Our brains and our friends will take care of the rest.
