I mostly like that the main character is an adult and a member of a team, not a solo teen.
Also tying into Kraco and shinta's comments, I think Outbreak Company did a much better job with using a wormhole/gate culture for political advantage. The Emperor's strategy probably would work the first time, but there's no way they would have stuck around for a second round. Outbreak Company handled it better because it was all about economics. Japan primarily wanted Petralka's (Holy Eldant Empire) natural resources, and made sure that they would be the new world's first choice by overwhelming them with culture (and that's all in the first episode or so). Outbreak Company is underrated, the only shame is that they didn't get into much detail about the other nations.
GATE is kinda doing the same thing the other way around, using the JSDF to level the field again after losing horribly months ago, but it lacks a lot of the nuance so far.
Slow start, but it looks like it will pick up.