You shouldn't really say that the updates are a bad thing. They happen about once every month and a half, they take 10 minutes and are usually really good, such as adding themes or making PS2 games look better.
And achievements are cool, but they need to serve more of a purpose. Take skill points, for example. You do the thing to get the points, and if you get enough then you get special videos or commentary. It should be the same for achievements. But then, what makes it worse, is that so many people are playing terrible games just for the achievements. But what Sony will do is when Home comes out, they will release a trophy system that will give you trophy's to display in your Home.