Series 11 Ideas-
Episode 1: A pure Historical set on a convict ship to Australia, to acknowledge the Doctor's new gender, the smart thing would be to place her in a setting where women had less rights meaning the Doctor has to come up with a new way to get out of the situation, so it is relevant to the story. During the story she befriends one of the convicts and offers them a chance at redemption for their crime and invites them aboard the Tardis. I'd imagine they'd be a bit more grateful at the chance of Time Travel than another obnoxious millennial. The Doctor would don a British soldier's uniform as a disguise, which would her main outfit, even if she keeps just the Red Coat.
Episode 2: Set on a Alien World, the Doctor and Companion meet a Sly, Charming Alien con man, a Glitz like character, played by Bradley Walsh, on the run from one of his former clients, a war hungry race out for revenge. He joins the tardis to escape them, though is secretly working with them to steal a component of the tardis which they could use to master time travel.
Episode 3 and 4: A remake of Blood of the Daleks, in part one, the Tardis crew arrive on a world which a human colony has settled on following which was a setting for the Dalek/Movellen war. The Movellen virus has mutated and is now affecting some of the colonists so have used the remains of the daleks technology to turn into daleks themselves. However these Daleks are born out of survival and not hatred so are more humane. Part 2 sees Bradley's character accidently summoning the Real Daleks, when trying to steal some of their equipment, who cannot accept these daleks for being different so they have a civil war. If they wish to refer to all the negative complaints Doctor Who has got recently, this is how you do it, Not accepting someone just because their slightly different, in a subtle Robert Holmes way, plus it gives character a new type of Dalek to sell.
The Finale- Throughout the series Bradley's character starts to grow a bond with the Doctor and whoever the other character is so refuses to help them take control of the tardis. However they break on board and steal the part they needed and begin to mess up time damaging the tardis and bringing an older Doctor to the present Day, either Mcgann or Smith. The older Doctor is kidnapped as insurance to stops Jodie's Doctor from interfering. So Bradley redeems his actions by Sacrificing himself to save time which restores the tardis. This means keeping capaldi's tardis for series 11, so when it's destroyed in the finale, we get a new one in series 12, keeping for a little bit just helps fans following the series with the new transition.
"it's seems that I am some kind of a galactic yo yo" - Jon Pertwee, The Claws of Axos