1 year bump, Well i still use CC because it is free and don't need to spend a dime on cc and has some features that don't exist from cc2
What I know from cc
For CC, I had a large project and now that I could just simply load pictures/levels from the file which saves a lot of space but uses more memory. Never make a lot of layouts in cc as it starts lagging the game engine especially the long terms of saving/runtime
I haven't touch cc2 but I heard you could just simply put all your things in the game engine. I don't use cc2 because of the high size for the exe and the lacks the full features of sprite editing as of cc and some plugins missing for cc like ini file as I know a lot of it. I never used xml files.
CC is buggy though but I tend to stay away from them such as form glitches and try to alternate methods to make a game. cc is still usable but needs workarounds of a game, it'll be just fine as it is.