I very much enjoyed running this campaign. A few twists and turns had the players enjoying the ride as much as the final showdown. There is a druid in the party so that helped a lot,and the players dominated the final battle. I would say if you're playing with experienced players to try and make it harder.  They even surprised me with how they helped Eryn at the end
I admit I tweaked some bits, but mostly to suit my players. Hope to see more content.