All games should be like Witcher 3 =P

No, but in all seriousness I do hope that Fable can return more to it's original RPG roots at some point and expand on those ideas, rather than keep going further down the action/adventure road and the like.

The Fable series and the Witcher series are too different. The combat system in Fable works and needs to be refined but not replaced.

Also the semi realistic style works better for the lighter tone of the Fable games.

Definitely, Fable 4 should have come before Legends. Expanded the world a bit more, offered a more immersive perspective like witcher and went back to the freedom of FB1.

Sure, but the devs don't have that talent, and Microsoft are a publisher apparently intent on running Fable into the ground, while giving it a meager budget.

I don't think Fable is ever returning from the F2P model. Depending on success or failure of this game, there might not be anymore Fable, or will just get expanded F2P presence on phones and tablets in the future.