Do we know if there is anyone overseeing the range? There used to be a Dan ? when it was just about releasing complete stories. Unfortunately it’s probably one animation at a time:-(
I think you are right. I personally would have done both "The Macra Terror" and, say, "Fury from the Deep" and then picked up, say, "The Abominable Snowmen" to try and stagger releases to twice a year with distinct teams.
The ties to NuWho are worth noting. I thought that "The Macra Terror" was likely to be one of the first because of its modern reference. That is why I think "The Abominable Snowmen" is not far behind.
I really doubt one twelve year old episode of Doctor Who is going to be drawing in modern fans to the 60s stuff (for some of them David Tennant is an ancient mystery from before they were born, never mind Patrick Troughton). It's going to be the strength of the whole brand, because quite frankly Father Dougal getting caught in a traffic jam to a furry convention isn't your best selling point.