Joe added this shortly after the above post went out (thanks The Agoraphobic Gamer).
I spoke in error here and need to correct the record:
The Server Slam build was not .9, but actually a version of our day one build! There will be *very few* changes between this build and the one players will be playing at launch.
Deeply sorry for the confusion! https://t.co/Z2dogSaRvO
— Joseph Piepiora (@JPiepiora) May 31, 2023
There will be a day one Diablo 4 patch and there will be changes to the game since the Server Slam.
As well as what we suspect will be bug changes, there will also be balance changes according to Jow Pierpiora. He has also confirmed that the patch will go live with the Early Access. I suspect a load of patch notes will drop in advance and we’ll keep an eye out for those.
It will represent the 1.0 build of D4, up from .9 that we had in place for the server slam. You will see balance changes and bug fixes.
— Joseph Piepiora (@JPiepiora) May 30, 2023