It's impossible for them to have not disappointed some people, no matter how many features they added. They can only do so much. This is an objectively substantial firmware update for a console. This first big update took awhile, but that doesn't mean that it's setting a precedent for timing. They have logically been working on a lot of fixes and features, and they waited until they have a good amount of them polished to release this update. But there's things they're still working on that AREN'T ready to release now. Maybe in a month. Maybe two months. Maybe more - who knows. It doesn't mean they are going to now only release one substantial update every six months.
A lot of us are disappointed that some features weren't in this update; friend notifications, themes/wallpapers, DLNA, local media playback, etc. I know I am, but I also know that they can't get everything out at once, and that maybe, to the broader gaming audience beyond hardcore gamers, Share and streaming improvements are a more pressing matter than themes and DLNA.