Been listening to this episode on my way to work, and a few things come to mind (mostly about wild shape).
There was a book series in the 90s aimed towards kids called Animorphs, basically a bunch of kids learn about an invasion of mindcontrolling alien parasites and are given the ability to turn into any animal they touch. While not all of it translates to my DMing, one big bit is that the instincts of the animal is there and oftentimes overpowering the first few times a given animal form is taken.
Regarding spellcasting, if a player was Wild Shaped and wanted to cast a spell I'd let them...they'd immediately drop out of wild shape because the magic giving them the animal form is redirected to casting a spell but I'd allow it.
And may I say it is so nice to hear someone else point out the spy-tential of the druid! It was literally the first thing I thought of when I first read about wild shape and it feels like no one else thinks of it.
Side note, has anyone run or played in an all druid campaign?
((Cross post - unsure which thread for this episode will be the more followed thread))
This episode gave me an idea for a different vein of druids. Normally I would think of powerful astronomers as either clerics who worships the stars or anarchists who understand them at a more meta-physical level.
However, listening to this episode it really solidified to me that there very well could be druids that worship the natural world that they (likely) can never touch - each star has a slue of planets they will never touch. Not all, but some, may have life they will never know. On a fundamental level, these druids understand that the uncountable stars in the sky, each with their own planetary systems and a tiny chance of life... but even with those odds... its out there. They know it. They feel it.