I know this will seem like a low level idea and probably wont be a top priority but as I have been doing more and more rework of one of our applications it has resulted in using many snippets. It would be nice that the pages that have the references to the snippets didnt display the whole snippet in the page as well. It would make viewing of the page much easier and be able to see what logic might be contained within the page calling which snippet. It would be nice if they were limited to a certain height. Then to see the rest of the snippet you would have to go to the actual snippet.
Again i understand this is low level but it would make troubleshooting and navigating existing applications so much easier.