[@Mahz]
I know a new editor is in the works. Meanwhile, I'm going to take a crack at these. At the least, I'll try and get you some pull requests to fix the bugs.

I've also noticed that comparable roleplaying sites have [div] tags, which opens up BBCode for insane uses. I don't know how I feel about that, let alone how you feel about that, so I'm not going to touch it.

I'd reply this to your dev blog if it weren't necro'd out.

[hider=current plan]+BBCode Cheat Sheet Update
+Fonts, ordered lists, size (the code to implement these is commented out - is that on purpose?)
+[ hr], [ url], and no parse
+line breaks, headers, and tables
+successive url tags eating spaces unexpectedly[/hider]