Dreadnoughts (IE Glorianas) are planned for the last section of the book. Where as alot of these don't belong in main BFG, ships of that class don't really either, so I was going to treat them differently and special and its going to take a lot of brainstorming and work to get them right. Don't want to hold up the rest for them.
A few fan creations were to match the most common 3rd party things out there.
The problem with Battlegroup Helios, is as awesome of suclpts as they are, they really are just alternatives to the main line. Like you can clearly make a Lunar class or Mars Class or Tyrant etc. etc. Same for their escorts. And the Novan ships are just SM Replacements.
Basically they are like a separate hull form, like Kar Duniash vessels or Voss Pattern ships.