You only have to pin your favorites apps, not all installed items are showed on that list.
You are asking for group name in top, which can be an issue if you have many group. That's why you can zoom out and see the list of all your groups at once to select the one you are looking for.
I get that, i'm not saying it doesn't work the way it is, for the most part it does. All I'm saying is that there should be one or two more ways to do things and then people can go with what works better for them. I know pinning the stuff you want up front and so on is the best choice but the default behavior so far is that anything you install gets a tile slapped up there (would be nice to get a choice when installing apps ofc), and then how many people are going to bother to remove all of them? How many will even know you can name groups and move them around etc?
I just figure a good chunk of stuff (unless MS does a great job with it's tutorial) is going to go unused or unknown by the majority of future Win8 users until someone a bit more technical points it out.
Going off on another feature, since multimon was brought up yesterday, lots of people want the start screen to be able to take up all of the screens (as an option) and not just limited to one of them. Also they would like to be able to have different metro apps per screen as well, right now it seems like metro app(s) only open in the monitor you have set to open the start screen itself though you can pretty easily move the open app around.