I just got the Xanathar's Guide to Everything book. There are some good, worthwhile spells in here along with a lot of junk and reprints. However, anyone who has survived the 3E and especially 4E D&D kludge knows that you only need to have two or three good options out of thirty bad ones to be super-effective. And I think Xanathar's gives enough super-effective options to make the book worthwhile. Expect something this Sunday or so.
If you're super-impatient, you can see me updating the guide in real-time. I'm already up to 4th-level spells, but then again most of the new spells are 4th-level or higher.
I hope you do a Q&A here on the forms for those that don't have the book yet please.