Does Doctor Who Need a TV Spin-Off ?

there is nothing sci fi about it?

Isn't it fantasy?

Merlin a sci-fi? Even if we say sci-fi/fantasy...Merlin's been off-air for five years. The beeb do not produce a bunch of sci-fi, fantasy tv and haven't for a long, long time.  Maybe you got quite a few Stateside at the same time later on but there's a real deficit of genre TB on the BBC.  It's a risky area as production costs are high and shows like Outcasts flopped hard but it'd be nice to see some more made.

No idea what show you mean

The BBC, to be honest, got Class wrong because the target audience for Class should be the same one for Doctor Who, really, in addition to the adults and children. The thing RTD got right, if nothing else, was getting the target audience and the TV climate right. He definitely got the audiences in, we can all safely say. Whereas Moffat and the BBC seem to look at fan reaction, but the fans will always watch. They should ask the public. That's my gripe with the woman Doctor. I think some audience members would like it, but a majority of those would never ever watch the show. And the people who don't want a woman Doctor.
You know, I have an interesting theory to why the Capaldi era has done several questionable things. It's our fault, really: the fans! I mean, let's be fair, we all were winging about the fact there wasn't an older Doctor: we got one. People were wanting some kind of romance in the series: we got one. Danny and Clara. People were clamouring for a darker Doctor: we got one. People were complaining about the fact we didn't have a female incarnation of a Time-Lord: we get Missy. I think in Series 9 it got worse, though. Right, bare in mind that this one is really just one-hundred per cent theory, but I think that Series 9 was originally drastically different.
So, do you remember how we were all moaning about the lack of two-parters: they consumed the whole series. People, at this point at least, wanted the Doctor to be less serious: we got that. In fact, I think all this stuff is what caused the title of The Magician's Apprentice to not link to the story whatsoever. Basically, they'd completed the whole story with the title of the next story at the end. Originally, the story would have either introduced a new companion, bought back Shona or been a character piece for Clara. Then the BBC said they wanted to change the plans and went to Moffat and told him that people really wanted two-parters and to make the whole series consist of them. Then, Moffat got vaguely worried and put forward Whithouse's story in production order because it was complete. (NOTE: I suspect the series would have had potentially two two-parters at this point). Also, the BBC got Moffat to put in a big name actress as a recurring role.
This explains Moffat's strange comments about the second production block maybe not being two stories written by him. The BBC probably wanted it different to the actual story it became and wanted to put in the Daleks. Also, I suspect that certain actors were contracted, explaining their appearances being a bit small, especially Kate Stewart. It also explains the different title for The Girl Who Died originally.
However, I still can't explain why Sleep No More got delayed in production and Capaldi storming off of the set of it.
Now, if you look at Series 10, we can sort of tell that the BBC wanted to do some things different and others similar. They thought two-parters didn't work: ditched 'em. Then they wanted another recurring character through the series from a well-known actor. In this case, Matt Lucas. When the series comes round we'll probably see more things like that, but for now that's all I know.

Peter Capaldi stormed off?

Whose to say it was the BBC and not RTD that got the target audience and the TV climate right?
Whose to say it was the Class Production team that got it wrong?

We don't know. But it seems it has changed now.

It was Moffats decision to bring back Matt Lucas!