But that wasn't the only reason Roddenberry signed off on the Animated Series. Roddenberry got his name out there and got checks to cash, and Fontana and Gerrold did the hard work. Not a bad deal, really.
Gerrold wrote two episodes. Hardly doing the "hard work".
As to the Mission Log podcast I abandoned it after their awful discussion of "This Side of Paradise" where one of them insisted that Kirk was wrong in removing the colonists from their "paradise", completely missing the point that the people were in no way consenting. It was pretty repugnant, and I had no interest in hearing them after that.
Another thing they do that is pretty annoying is that they absolutely refuse to discuss the episodes in the context of when they were created. For some reason, they expect a show created in the mid-to-late 1960s to reflect a modern sensibility regarding women's roles, sexism, etc. If I expected everything I read, watch, or hear to reflect my own personal attitudes in the year 2014, I'd never be able to enjoy anything more than a few years old.
They often miss the forest for the trees.
They also assume that Trek was created out of whole cloth and not something created by many and built upon over time. They'll complain that Kirk's actions are not consistent from episode to episode, whine about why characters don't remember events from previous episodes, etc - all typical traits of 1960's TV shows.
I personally enjoy Trek's inconsistencies and see it as a wonderful tapestry with many avenues to explore. If every single thing was explained, sewed-up, consistent - I don't think I would find it half as engaging.