I would like to see "plugin" functionality added, to dynamically download and add libraries to the IDE. Something similar to eclipse.
Intellij Idea has a similar functionality. There is a menu with a search option, and you can then read descriptions of libraries, and download them on the fly.
I think you would need to define a way to package these plugins, and prepare a repository.
This could allow the arduino IDE to be fairly stable, but new functionality could still be added without major revisions.
I don't think there is anything wrong. I have seen other posts asking for more libraries to be included however and I think that that is a never-ending request.
Building in the ability to find and download libraries would take care of that request, and also add a nice feature to the IDE.
It could even be extended to automatically search the playground for the requested library.
Like:
-Rightclick the name of the header file, get option 'download locally' and 'download from playground'. Thats it for the user.
After download is complete: Sketch ready to compile.
Basically this downloading/ fetching online Libs is a wonderful idea - and it could be extended with a 'search for updates' button. Think of the easiness - every lib just needs an XML file with name, author, version and thread to the discussion in the forum. That would be sooo awesome