Definitely feels weird. I know it really doesn’t matter, being a time travel show and all, but the doctor splitting into two different people was definitely something I was not expecting. I hope they can wrap this up in a satisfying end, and that they don’t just leave 14 on earth never to be seen again.
I'm thinking Russel did that to address to issues, the curator in the 50th special, and the Renegade Doctor. I know a lot of fans, m'self included, want her to return, but how do you explain her? Well, if the doctor bifurcated... Sorry, bi-generated in the past, willingly or unwillingly, that could mostly explain her, and if 14 and 15 are running around at the same time, no reason she can't either.
Thinking about the curator, that might even explain why Russell brought Tennent back.