All three console makers release unfinished products, as they should be given how they can improve them going forward. Sony have been slow to update some features of PS4 sure. But MS are not perfect either, they released Xbox One with a ton of missing basic missing features, perhaps to focus on getting Kinect ready, which they dropped within half a year despite promising numerous times they would never do so. They are also guilty of being very American-centric with their entertainment options. And Nintendo are even slower than Sony, they still use region lock and have had a backwards mentality to accounts for years.
So yes Sony should be updating features on PS4 quicker, but they are by no means the only guilty party in terms of releasing unfinished products











