How many games make use of all engine features to it's full potential? There is bunch of indie games make a way to hall of fame even using limited game engine features. Sophiscated software is not guarantee to make a success IP. It's more likely about how to put the idea & creativity into viable gameplay.
The compatibily of C3 being able to open C2 project is enogh for me to assure one time I need to adopt certain feature or deploy to broader platform, they are available.