Heh. I've thought about doing this myself for years but didn't have the skills needed to pull it off, or everytime I started I got distracted by something else. Chaos Mode was the closest I've gotten in recent memory and it's just kinda MEH with regards to that.
Suggestion: Add the Dragoon class that Mercenary Lord made. It's not posted on the forums, but I can get permission for it. IMO it's better than all the available halberdiers. I was planning to include it as an insertable for a post-release of FEXNA so getting it in with this project too would be pretty cool.
Also, you'll need to make a whole new set of nightmare modules so that newbies will be able to use this new patch. That's more work. Just stuff to think about.