Honestly same, I just started the VN and was really liking Marrowyn, I saw your comment and went 'It can't be that bad, right?' well...
Anyways can't say much about body but now he looks way older to me and I'm not sure I like it tbh (I tend to prefer older characters, but not this time...), hopefully we'll get used to it quickly (Don't want to criticize tbh, just was caught off guard by the change, missing that lovely big dumb/smart face(?)
Edit: I changed my mind I actually like quite a lot the new sprite, it just took playing a bit more to get used to and ended up really liking it, still I understand why people complained but I think it ain't bad tbh