I'm watching it on air, so yeah, it's almost over, and I didn't really like it. I feel like it's just another generic isekai. How to identify a generic isekai? Easy: long titles, invincible protagonists or revered as heroes or kings (in this case), secondary characters with little development and typical clichés of fantastic stories.
But hey, I think it's better than nothing. Sure, it's noticeable that it's a clear copy of Overlord, but it's not all bad, I think...
Good review.