Maybe, maybe not: it's not a purely thematic Splatbook, it is a Season tie-in to a specific campaign involving a war with the Red Wizards of Thay. Takes all kinds to fight a war. However, the point of of my exercise was to try and give the maximum page count for the crunch to compare to the total page count, realistically less than 18 will be in this book, also probably fewer Spells than Xanathar's, fewer magic items than Book of Many Things, and fewer Backgrounds and Feats than Here's of the Forgotten Realms. That's the point of the exerckse: overestimate how much is crunch, and we barely get to half.
The Cvikiar might fit with Dragonlance better, to be fair.