In my personal, extremely biased opinion, Swordfell is a brand new untamed, virgin realm, which means to you that you can not only build your character the way you want but you have the chance to build a brand new realm the way you want (with everyone elses ideas flying by) - that's the pro. The con is that it will likely be you, me, and Lord Enoch building the whole thing. Everyone else is contempt with their titles. They speak up once and a while but nothing substantial. That's not to say that they are bad guys, I like'em! But in terms of taking advantage of the HUGE opportunity that Swordfell presents us there really isn't a matchbook to ignite socially. I pray every night that the other players take notice of what they have and get active. Meh, they do what they can.
As for D'Hara, it has a great history/tradition, a great playerbase and a well established social system. I miss my days playing in D'Hara (and to be honest, but don't tell anyone else, I have been trying to transform the realms I've lived in to D'Haran-esque realms. And I mean that socially. We had tons of fun RPing together there. I guess I should say 'back in the day' because maybe only two or three of the original D'Haran players are still there. Those were my favourite times though). If they continued that social tradition than D'Hara is a plus plus.
As for religion, Swordfell is SA but not a theocracy. If I say more they will invade and depose me :/