You think it's reasonable that he should continue at the helm of Mojang and retain control of Minecraft IP until what exactly? 10 years pass and the brand (which Minecraft has become) finally fades in popularity?

So he can release it as open source, to make good on what? Some "About" page he wrote fucking 4 years ago when Minecraft was nothing but a PC indie sleeper hit?

Get real.

So what? He should screw his business partners out of 2 billion so he could keep a promise from years ago when he had no clue how this would go?

Especially a promise to a community that throws him under the bus whenever something happens they don't like (even if he isn't involved)?

I don't think that is reasonable.