Yeah this was my main complaint. Its not that I cannot find the devils in the new book (it is more work but I can find them), but so often I find that when I am using monsters I rarely go "I want an IRON golem, I want a BLACK dragon, I want an ICE devil".... instead I start from "I want some golem, I want some dragon, I want some devil" and then I will pursue the book to find the monster with the right abilities, CR, lore etc that fits the mold.Maybe. But when you're looking up devils, it's because you want to reference all of the devils typically. I don't agree that it's six of one, half dozen of the other. YMMV.
Doing that in the new book is exceptionally tedious.