You are right about that! I see how that can be a good thing. The only problem is who will give a good app 5 stars. Usually if you like an app, you don′t delete it and thus not rate.
Well, the way I see it, the ratings system is currently TWO systems that overlap and are melded together.
Let's imagine them being seperate for a second:
System A:
People who use an app and then decide to go to iTunes and rate it. This should be a somewhat 'fair' rating determined by users who like it. It's a small percentage of users, but since they all like the app well enough to keep it you can trust that the ratings are based on actual knowledge of the app.
System B:
People who erase the app and are prompted to rate it. SOME of these will be high ratings (I've erased games I'm done playing and given them a '5' using this method) but the overall score will be dragged down since EVERY dissatisfied customer is being asked to participate.
Now, it would be interesting to see these scores listed seperatley, but we don't have that optoin. The numbers are just mashed all together.
But this is STILL usefull to us! Why? Because it's not just each group's rating that maters, but its
size.
Imagine a really good app that people love. It's going to have a large number of "A" people and only a small number of "B" people. So the "B" group doesn't really affect their numbers all that much.
Now imagine a really bad app. The "B" group will quickly overwhelm the "A" people and, as I said, that's a good thing.
So on both ends (really good or really bad) I think this system works well.
Where it's less clear to me is the mid-range apps. The ones that are pretty good but not great. In those cases does the "B" group unfairly over-run the A's? It's not so obvious either way and we have no way of knowing. But Apple has those numbers. Perhaps they've learned that the mid-range group is actually suffering. They can see the numbers, they'd know if it's true. So perhaps that's why they're dropping the feature.
It's a shame, like I said I appreciate what the system does for 'bad apps.' But if they've determined it does more harm than good, well then that's that!