As a follow-up to my previous post, I do wish they had put the draconic deities in SCAG. There are a lot of humanoid followers of Tiamat and Bahamut, and the remaining deities would be useful for those dragonborn who go outside the norm and actually do worship gods.
Then again, no doubt in the future we'll be seeing a VGtM-type book that will cover dragons, and no doubt the draconic pantheon will be fully covered there anyway...
There are a lot of FR gods they didn't get to in the SCAG which is my biggest complaint.