Crystal gummy sphere?I was hoping the digital copy would be delivered via thumbdrive encased an a crystal sphere.
Looking at the images, I'm thinking slipcases?
This. Also, book bundled with board game.I think breaking the setting book up into pieces that are player relevant, and not, is rather more the format change - several 64 page books rather than one 192 page book.
This. Also, book bundled with board game.
IIRC, they did say that for the Mass Combat rules for Dragonlance: Shadows of the Dragon Queen, you can either use the abstracted rules in the book OR the new Warlords of Krynn Battle Game. So pretty much the Battle Game is compatible with the 5E TTRPG. Which is similar with how Modiphus did with their Star Trek RPG and its optional Red Alert combat system/Battle Game that you can use their miniatures for.If the book and boardgame actually interoperate, now that's a real format change.

(Dungeons & Dragons)
Rulebook featuring "high magic" options, including a host of new spells.