Responses
I haven't seen the latest chapter but you are right! Padak(past artist) officially stepped down from drawing, there is a new artist but they've been told to maintain the art style so that might be why you feel like you're tweaking. I got this from reddit though, https://www.reddit.com/r/OtomeIsekai/comments/1twsua9/change_in_artist_how_to_ride_the_heros_coattails/

Am I tweaking or has the art style changed But the story is still peak