Hmmm. 5/10.
I see stories like this sometimes, but there's not a good word yet for the particular quality.
Hm. "Trope-based physics", I guess. Or "Plot stylization".
People in this manga behave as caricatures; there are limited modes of interaction, such as the Tsumommi/boke-routine, and every possible interaction is shoehorned into being one of these, because that's the only way the author knows to be funny. It gives an air of inauthenticity to the whole thing, like the author is playing with emotional LEGOs.
This doesn't preclude these kinds of media from being good; a smart author can still squeeze in some novelty.
(For example, I'm rather fond of the webcomic "A Magical Roommate", where a sufficiently large cast of simple characters results in some complex outcomes.)
But in the case of murabito tensei, this tendency makes a mediocre manga worse.
