ok what I mean is

Shadows are supposed to be a standard feature nowadays
A guy who bought the Unity Indie version sooner or later wishes to have the pro version , too

In case of Game Core on the contrary there is absolutely no needs to buy the pro version for an amateur even though he can affordi it due to the fact that the Game core 2,0 Pro version supply real "pro" features

I mentioned the possibility to publish both for windows and for Mac
I can add the support to set up a master server etc

Game Core 2,0 price policy is quite fair and the lack of a finished game is not a main issue , for a new engine

If it is possible to code fragmnents of game or small levels than it is reasonably sure that the engine is stable