If you even payed attention to the presentation he clearly says he is now going to show abit of the roadmap, so the 4 patches he shows are only part of the roadmap and not the whole thing, he just trying to skip on almost 2 years of development just because it doesnt show every single part of the roadmap.
If something is not quite right then there is no point in adding to a PU until its ready, the PUs main goal would be to discover bugs much faster with a larger playerbase so it helps smooth things out, its not essential to add new things into the PU until they are mostly complete but they still do it fairly often anyway.
what sad news is that, if you take a really good look at what they are doing with the game and the size of it you cant really expect it to come any faster than some of the largest projects done so far, first 2-3 years development was much slower due to building up a company from scratch so all things considered its coming at a reasonable pace.