You are just angry at something that you can't change , all companies do the same , they release an update and then they give the change notes after a while , or go meet Microsoft , they won't tell you what changed. or say hello to Steam
I don't represent ESET , and I don't work for them , but a delay of a bit or few hours after being posted in their download page and after that to their forum , it doesn't mean anything bad , they have posted it they didn't hide them , It's just a matter of a little bit of time delaying the upgrade so you can read the notes and after than initiate your up