Dropping some of my random thought.
I usually despise any story, especially manga that relies to much on monologues to narrate its story. However I'm not bothered as such with Kumo desu ga, Nani ka, and it's quite strange when I think about. After put more thought into it, the reason is as simple as it just the most possible way to narrate story with the current plot structure. Though it's also helps that Spider-chan narrates her predicament normally. Outside some bad ones, even exposition monologues still come off naturally (and they can be easily skimmed over while retaining the general gist of the information). Kumo desu ga, Nani ka so far seems managed to avoid the trappings that plagued many LN especially the isekai one. First, it used "game" elements in rather meaningful way and not just comestic, and second, the character within the story, that is Spider-chan so far, narrates her story as a normal character would that is not nagging the reader with her (past) identity.