That was very thoroughly and well put. My only addition would be on the bigeneration thing which, honestly, needs to end. It was introduced as an aberration so rare it was considered a myth, and… apparently now it’s not?

I know Russell T Davies immediately suggested in commentary that all the Doctor’s regenerations retroactively might turn into bigenerations, but I don’t buy it. It happened twice now, maybe it’s apt that this fluke happens in pairs and then never again please?