The game is very fun, and I enjoyed the world and characters, but the ending is absolutely underwhelming.

I don't want to spoil anything, but the theme of the entire game is consistent and amazing: until the final mission. The final mission completely throws out the game's theme, and it's just a mission and an epilogue.

After getting myself super engrossed in the world, the ending felt like all that imagination and hope and wonder was crumpled up and thrown in the trash. And then pissed on, and maybe lit on fire for good measure.