I think it would be good to have a description of the content of each build. I am not asking for a 30 pages documents but a list of issues fixed (just a title) and a list of improvement(s) in the new build. That would be very helpful.
It would be great if we could share the change log of our development process with a private group of partners, but at present we don't have the resource to build this. The alternative would be to manually document each build, but with builds happening daily or more often, again, lack of resource prevents this from being an option.