IPhone :: @Apple: Function To "reset" Installed Apps Possible Or Planned?

Apps and the Appstore are without doubt one of the key features and strengths of iPhone & iPad. They are one of the reasons why I'm using an iPhone and why I've ordered an iPad. However, many useful apps seem to eat up more and more memory for no obvious reason. For example, recently I deleted and reinstalled an IT news app that needs about 11MB itself, but memory usage had grown to over 100MB. These apps normally load new stuff from the internet at startup. As one typically only wants to read the latest news, there is no need to waste more memory than needed and no one can tell me that such news apps need lots of MB for some text and a few small-sized images.

It is not quite "Apple-like" that I need to delete and then re-install such apps (which also requires looking them up in the appstore app and then entering my itunes password, downloading, re-installing, finally placing the app where it used to be). Therefore I wonder whether upcoming iOS versions could get a feature that simply enables resetting apps without deleting them. Ideally one could choose to keep user settings and only delete temporary data. If I now check memory usage, I can only delete the whole app, which is not what I actually want as I told above. I just want to free up some memory from time to time, memory that is just wasted for whatever. I'm not familiar with iOS programming, therefore I don't know if it's possible/useful to separate the memory into distinct parts: one for the actual code of the app, user settings, and temporary data. Maybe that's how it's done already.

Info:
iPhone 4, Windows7