I seem to have a bad habit of not making myself clear
. I know that this is just the two longest Tuor-related texts grafted together. By a "completed" tale, I meant an enlarged account of the Fall of Gondolin with all the necessary editorial corrections (updating of names for the BoLT sections, etc.) that can stand alone as a published work, a la The Children of Húrin, just not edited by CRT.
What I was wondering was why the powers-that-be hasn't snatched it up for a wider release. Even though Lewis was the one that pieced it together (on an unrelated note, this guy isn't related to C. S. Lewis, is he?), the Estate holds the rights to the text itself. So why don't they just release it? Most of the job is done, already. I mean, Priscilla Tolkien has a copy, and editorial work will be reduced from the normally massive job of bringing the texts into line with each other to the correction of spelling and other mere tidy-up jobs. It would be the easiest Middle-earth-related book CRT has ever had to churn out, that's for sure.
If they can avoid being as overly lush and elaborate with the book design as Lewis was (obviously done to justify the $1,000+ price tag), there could be a potential profit in this.