The title sounds fun, but the visual screams blandness

Really? The title screams 'Genericc Isekai slop with 0% substance and 100% titties'.

What, you don't like bikini brawler, booba swordster, and tank?

That is incorrect, at least as far as the manga goes. It is heavily oldschool D&D inspired, using things like dice rolls, vancian magic, and technical arguments for getting the edge. Plus, solid narrative and encounters where the protagonist isn't OP. The OP specifically chose an octopus familiar, because each limb counts as an action under the ruleset.

This particular manga is closer to Goblin Slayer, Speedrunner, and Dungeon Meshi in spirit. Hopefully, that translates onto the silver screen as well.