I think Moffat's had quite enough of Who, much like RTD. Chibnall is a decent showrunner and he isn't a terrible writer, but he isn't as good a writer as either of his predecessors and, maybe more importantly, he isn't a showman in the way either RTD or Moff were. to be honest if nothing else I'd expect his episodes to be more evenly spaced in his second season, rather than front loading them all as he did this year. I can understand his thinking, wanting to lay the ground work for his Doctor, but as I say he just isn't as good a writer as he maybe thinks he is.
I'd be surprised if Jodie isn't the Doctor for at least 2, and more likely 3 years.