Should probably preface this by saying that I was fuming about David Tennant coming back, even as someone who's favourite Doctor is 10, so these episodes were always going to be an uphill struggle for me.

I haven't really enjoyed these episodes at all, and the bi-generation was the final straw for me. I think my biggest issue with it is that it feels like it undermines Ncuti's Doctor. While there are multiple Doctor's spread across time, I think it's important that there is only one Doctor (and also one TARDIS!). To have them split in half, especially with such a beloved Doctor, feels like making Ncuti less than and not a "whole" Doctor. One of my major concerns about Tennant being back was that it felt like Ncuti was being set up for a fall by having to follow one of the most popular Doctors, who people would inevitably be sad to lose again. This somehow was even worse than that. I don't want to be concerned that DT could show up at any given time, I want to be all in with Ncuti, and I think this sets a slightly silly precedent.

It also cheapens the regeneration process for me. Regenerations are supposed to be painful, it's a time for the viewers and the characters to say goodbye, whilst also facing the excitement of moving on to something new. It felt like a cop out on both of those fronts, especially with 14 (still not happy with that either!) getting to live a whole other life. It all felt very tidy and happily ever after, in a very un-DW like way. There is also the element of been there, done that with the two David Tennants at the end of series 4.