Over all, pretty good.
The first seasons were awesome, the later seasons felt like the writers hadn't planned that far out and just threw some stuff together.
The death of Allura was unnecessary, why in the last episode? Either she should've had the tragic hero death in season 5 or 6, or just left her alone.
Shiro's wedding. I don't buy it. I think Curtis is straight, he and Shiro are homies and they got married for BAH and disability benefits. More legit than the official story.
I would've liked for the story to have had more diverse bad-guys, instead of working their way through the family and their henchmen. Like a vassal state which attempts to supplant the Empire. Something to shake it up a bit.