I'd like to suggest something to (what I think) make construct even more superb
How about image/texture compression in runtime? If you could make an option (preferably in the picture editor) that allows you to set image's export quality (ie. png, jpeg, and in case of jpeg allows you to set it's export quality). Of course the cap file would still contain the uncompressed images, but you could significally reduce the exported exe's size.
Also a little correction to the system object. I believe that in "pad number with zeroes" expression, should be "zeros" not "zeroes". But how bad is my english to make such corrections...