I think some people hope C3 will be the engine that helps them make games. If C2 didn't do that already, it's not a problem related to the engine, but to something else : themselves.
I am not particularly exited about C3 to be quite honest. The features that were announced sound cool and everything, but for the time being, C2 does the job for me and, while the improvements will be appreciated, I think people are getting a bit over their heads about the whole thing.
Be patient and make games with C2 for now. Didn't it do the job before C3 was announced?