I did a couple of things differently:
I didn't do it in the crockpot this time--I boiled the chicken and shredded it before putting everything in a pot. It's still delicious but much more time-consuming. Can't wait to do it in the crockpot next time!
I also accidentally purchased 10oz of fire roasted tomatoes instead of 15, so I mixed it with a 10oz can of tomatoes with green chilis. It's still a mild/medium spice, but I wish it had a little more kick. Whoops!
It was also a hit with my brother, who's pretty picky, so overall, a win for this one.