It's still the three of them: two men and a baby. There is no way that that can work either.
I could agree on that. But this time would be based more on my own opinion. According to what is shown on screen during the last scenes of TFP, it does work better. Of course we can only see literally seconds. But those are the seconds the writers decided to show us, to create a very specific feeling that, to me, is the feeling that they have arrived to a good place as adventure partners.
I would hope it could, but we might not see it, anyway.
I maintain that John still has his own house at the end of S 4, anyway.
Yeah, as much as my Johnlock heart wants to picture them parentlocking like crazy in 221B, John staying at his house makes more sense.