One thing that really needs improving in the App Store for developers is the user review section.
There are flaws in the whole process, some of which have begun to be addressed in iOS4, for example the controversial feature of forcing a user to rate an App upon deletion (which can only be a good thing) but there is still room for improvement in many more areas. As i see it there are two frustrating areas that really do need to be improved that will not only benefit the developer but also the user.
Giving Support to Users
Firstly, a developer cannot give direct support through the App store to a user who has downloaded one of their applications. I've seen many reviews left for Apps (some for my own) that simply state 'the App doesn't work' and there is no way for me as the developer to contact that user directly to resolve the issue. The vast majority, if not all developers of any software want the user to enjoy their application and removing any misunderstanding of how an App works is crucial to this.
A review cannot be 'contested' in the App Store by the developer too, therefore false or incorrect statements on an App that can have a detrimental impact on future downloads/purchases cannot be rectified. Even if the developer could resolve an issue with the user directly and then allow that user to modify their own review comments would be a big step forward and would likely give a more accurate set of App reviews.
Country Specific Reviews
Secondly, I don't see the need for country specific App Reviews. As an example, my App shrinkURL has some exceptionally good reviews in the U.S. App Store, many more in fact than in the U.K. but a user outside of the U.S. will never see these reviews to assist them in deciding if downloading the App is worthwhile. Why should they be separated out by Country?
Also, as a developer I cannot see a consolidated list of all my Apps reviews, yes iTunes Connect allows you to see them but only if you go through each individual country and do a manually check – a real painful task at the best of times, this is flawed further by the fact that iTunes Connect only shows reviews for the current version and not all versions of the App since release.
I know Apple are continually improving the whole developer toolset and it's supporting processes but I'd like to think that these two points are on the roadmap for overhaul.