Alright, three things come to mind.
One: "Are you my master?" lol fate reference
Two: Normally in "strong guy gets banished" the girl in the party is in on it and the author humiliates her in a "stupid girl should have realized how incredible the guy who was in love with her was, now she's gonna cry remembering what could have been", but this time the girl seems clueless about the fact the party leader kicked the MC out.
That's more interesting than you think, because manga with this premise normally do this to capitalize on the lonely guys who want to feel appreciated. By making the girl obviously already like him from the beginning he might alienate that portion of the audience who just wants a power fantasy they can relate to. She'll also obviously join him later considering she's on the color page.
Three: Slavery in these kinda isekai is normally there to set up a relationship between the characters in a lazy manner, like "oh my god he's nice to me even though I'm a slave I will love him forever", but for us westerners who have a story of frequent slavery in our countries histories (unlike Japan), this leaves a bad taste in many people's mouth, because "why isn't the super OP MC doing anything to free these oppressed people? Why is he going along with it? Are we supposed to think he's a good guy?"
While the premise is still a lazy way to make the characters meet, the fact the crux of the story involves freeing people from slavery and building a country does make the whole thing more palatable and does make the good protagonist better actually feel like a good person.
Overall, generic isekai, but it does have a few different things about the way the story is told rather than completely cookie cutter aside from the title's gimmick.