A lot of good points has been mentioned here already, though there is one thing which slightly puzzles me a bit.  I'm going to pretend to be a curious person coming across your thread for the first time.  I'm puzzled by the Medieval and yet Sci-Fi tags.  With Medieval I think swords and shields.  With Sci-Fi, I think Jedi, spaceships, aliens and robots.  Medieval fans might be turned off by the Sci-Fi tag and vice versa.  What's the Sci-Fi element in your RP?  Could it be categorised as something else?  When I browse an RP, the tags are my auto-filter.

That said, I'm going to give my 2 cents on what you did [i]right[/i] because knowing that is good as well.  

*  I liked the scroll at the top of your post.  It sets you apart from the Casual threads which are Low Casual or actually Free.  IT shows to me there is effort in this thread instead of "Hey, let's be vampires!".  It makes me want to read the rest of your post.  First impressions last.

*  I like visuals.  Maybe it's just who I am.  Maybe this is more towards the Advanced level, but a picture speaks a thousand words.  The map makes me feel like I'm already part of the world.  It's no longer "You lot are... here.  And those guys are...uh, there.  New guy, you're somewhere named...Random Town".  Similarly, The org chart allows me to know who's who.  So many times I've seen characters becoming confused with each other because it was hard to identify people and their alliances.  "Wait... you're not my King.  Who am I replying to?"