One thing i REALLY REALLY hope they pull back on is the excessive artwork. Yes, it's great and gorgeous, but for a book chock full of crunchy rules, i would rather have an extra page or 10 of rules instead of a full page spread of art.
I am a little worried.
5e is pretty solid so far but there's a LOT that needs to go into the DMG, and it seems like WotC's philosophy of late when facing the limited page counts of the PHB and the MM is "we'll put that in the DMG". So much is being slipped into the book and there's no shortage of expected content.
Aside from all the must-have stuff that needs to go into a DMG (advice on running the game, rules for treasure, rules for building encounters, etc) there's all the promised content they've been teasing for years such as the modularity that the whole edition is built upon.
It's going to be hard fitting everything people are expecting into 320-pages, not without sacrificing a lot of content like magic items or rules modules.
Really, I doubt WotC is certain of everything that will be in the DMG. They're still working on the book. And they were hard at work on it during GenCon. So they've been working on the DMG for well over five weeks straight, and had to delay it to continue working on it. They saved it for the very end after burning themselves out on the PHB and MM.
I'm pretty confident the D&D team will make a solid book. But so much is resting on the DMG, so many people are being told "wait for the DMG", and so much missing content is explained as "wait for the DMG" that it's inevitable that the book will disappoint.
Do you expect it to be a book?
Thaumaturge?
OK, you got me on that one.
But APART from being a book, I have no expectations....
OK, APART from being a book, having text (in English) and artwork, being 320 pages, and being about D&D, I have no expectations.