@Merilirem Mhm, i think its both important, if it wasnt i would only read the LNs of the good stories
but the Art in itself is more of a personal opinion, sure, there are styles we all can agree on are shit, but often its just preference. If you take Moon Sculpture thingi, i didnt read the story yet, but i heard about the downgrade and compared for me (because i want to read it, but would hate if the art gots shit when im invested) and I thought that the Art after the change looked a good touch better than before. (Well, it would probably still bother me if im already in and had read many chapters in a the first style, just because change in a series that i ongoing always feels weird)
I am fine with the Art of this one tbh, its relativly simple, but that isnt so bad, had to get used to the faces a bit, but i do like the change into a cut down version in comedic parts.