How far should a franchise go away from it's original formular?

[Mystro-Sama]

Acevil said:

Wright said:

You never know. Look at Final Fantasy, each installment always makes some crazy changes from its predecessor, yet it is widely loved by the gaming community.

Umm.... you do know that the last couple of Final Fantasy games have divided the fans further than ever before. 

XV will make FF great again.