I agree w/ RV & JC on this. The announcement of a release is not a pedagogical document. It is just the announcement of a release. We should actually put effort into *not* going down a rabbit hole of explaining things here. The main reason I'm in favor is that those few who actually update via debian packages or download from Sourceforge will be using a different version, and should know that in case something breaks. Also to remind folks that we actually do stuff. With that in mind, I think the post is lovely as it now stands. I do wonder if we should mention https://sourceforge.net/projects/tei/ as another place you can get the new stylesheets, though.
Council responsibility for stylesheets is for those that we use to generate the website and those that we use to process ODDs. Everything else is optional but nice for the community (IMHO)