I haven't been using Composite C1 for that long, and I haven't launched my first website (but it's on its way), never the less i feel that I have a few ideas that could improve the overall experience of the CMS.
1) Creating a functions requires way to may mouse clicks. Changing a control type takes way to many clicks.
It would ease my day if the trees automaticly expanded to the first "folder/namespace" which has anything else but a single folder inside. The first 2-3 clicks are just a waste, Since you always need to expand "All functions" and in most
cases "Composite" aswell.
2) On the Media tab i'd like to have preview function. it's hard to figure out which files are what only by filename. not every use is a genious at naming files :-P
Having used for instance Dynamicweb, the filearchieve there is pretty good, all images are listed with a thumbnail and filename, and that works very well
3) Where is the save and publish button?
Again this is to cut down on all the clicking ;-)
That's all for now, but i basicly love everything else about this CMS :-D