Speaking of things left out of the Romulan War books for lack of it being a trilogy versus just two books, Martin just gave an interview at Star Trek.com
where he lists some of the things he wanted to write in a novel set "in between" Beneath the Raptor's Wings
and To Brave the Storm
. I think I recall somewhere he wanted to call it In Shariel's Jaws
Some intriguing ideas there. Such a bummer it didn't happen.