If you guys are concerned with making a gameworld that interests a larger diversity group of players while not losing central emphasis on it being an RPG, consider
http://www.avalon-rpg.com. (The thing doesn't get much hype or advertising, so far as I know, yet has been around for 20+ years, is a text-based MUD, and isn't free — though fees are paltry.)
What does RP include to you? How does PS emulate that? In other words, how does PS allow you to accomplish what you deem RP in a way which nothing else does?
Well, then there's the idea of living on tiers inside a stalactite, but that's not really evident in the game, and the landscape is rather bland at this point in development.
I will also add that i've had a very frustrating time exploring, even when looking for something which i've been told was there and shouldn't be hidden in any way.
Please pardon a new player, and maybe i simply haven't tried enough, but: Where are the entrances to the sewers in Hydlaa? Why can't I find Nyshyn in some ruins somewhere on the pass between Hydlaa and Gugrontid? When Harnquist wants you to get the experimental blade from Barrin Dhorod, why doesn't Harnquist know where to find him, or who to ask?
In no way am i recommending the stupid HUD map with moron-resistant flags at each point of interest for a quest. These are just some examples of difficulty a new player has had.
There are also some problems with the GUI which make it resistive to play, but i haven't finished documenting that yet.