Feedback on some of the points raised here from my own extensive use of C3 during the beta.
1) Already exists, right click object on layout, clone object type. It's just missing from the right click menu on the right panel. Minor issue, but having different right click menu's is a bit of a nuisance I hope they sort.
2) I agree, I think showing the spots when you've click on an object like a sprite would be useful.
4) Plz no ribbon, it's big, ugly and just takes up too much room. Not only that, but as of yet I can't see a need for it and I've spent maaaany hours in C3 by now. I would be spending more time in it, but those restrictions, my project quickly hit the limits