"whole" is not what I would call Daedalus' Fall for Tohaa... "partial" for Spiral, yes ;) Campaign Paradiso was, indeed, quite centered on Tohaa... as it should considering that it was their introduction, and the campaign system in a planet quite tied to both Tohaa, CA and Humanity's collision. Daedalus' Fall has little to no fluff on the original Paradiso Campaign, only the scenarios and the "campaign tree"... the fluff, and I think the original Tohaa Vs Ariadna campaign, is still only in the Paradiso Campaign book.
Fair enough, as I mentioned I am way behind on my fluff readings. I assumed that since the name of the book is directly related to the closing of the Tohaa gate and the restriction of Tohaa forces in the Sphere (justification for the shelving) that the book was largely about exactly that situation.