The first big arc has just wrapped up and, in addition really loving how well Brennan plays the familiar, I'm also really impressed that he took the Wizard, the Witch and the Wild One as a structural element of the campaign, creating fronts/NPC groups for each of those characters and setting them all in motion as antagonists (all of whom genuinely believe they're in the right, which makes it even better).
The wizards are currently in the lead as antagonists at this point in the campaign, but all three sides are going to crash together at some point and the PCs are going to be able to at best probably just contain the collateral damage.
This is the kind of campaign structure that I aspire to do, where no player character is the star of the story and all of the party's themes are integral to the campaign.
I strongly recommend this actual play podcast, for folks who haven't listened to it.