Chaosmancer
Legend
Crawford talking about Shield, which is not on the primal list, is kind of silly to me. Why is he even bringing up this interaction? You have to use a feat to take it, and it's one feat option of many.
I was also really stunned and confused by his comment that the "power" of the tiny form came from being able to move through the spaces of multiple enemies.... with seemingly no thought given to all the attacks of opportunity that would trigger? Like, sure, I could turn into super rat and run through the spaces of three orcs... triggering a minimum of three attacks of opportunity, which at low levels is a death sentence. Unless I disengage first? But now I have to wonder, what are you thinking Super Rat is going to do by disengaging and running through those orc's spaces that could not be done by disengaging and running AROUND them. And at a certain point, it becomes such a niche option that... yes, let's let them do that, because it is a niche situation where they have a clever solution.
And, on shield, Shield is EVEN BETTER on a druid in their normal form, because the normal form has higher armor. Being able to cast abjuration spells is nice for Moon Druids who wildshape, but druids who don't wildshape can cast ALL schools of magic, so it isn't that the Moon Druid gets this powerful option, it is that wildshape has to be worth LOSING the other options.