Just a couple of videos I think covers the concept pretty well: in which one of my favourite reviewers ever tackles both the pros and cons in the Equestrian Diarchy. And discusses both their portrayal, and characters.

I hope you enjoy!

(Also: Celestia fangirling at The Force Awakens is the best thing ever.)

I loved both these videos. Thanks for getting them out there!

May God bless you as well!