Well if you haven't heard about it season 2 of OPM is out after 3,5 long years. If you have watched the first episode of this season you will realize that the animation style is kinda different and this change is because of the animation studio got changed from Madhouse (season 1) to J.C Staff (season 2).
King: design was really different compared to the last season, instead of having a wide face they made the face longer. It doesn't bother me as much because we didn't get familiarized with King in season 1 too much to get annoyed.
Fubuki: She looks a little bit childish (almost like a mature version of Tatsumaki), i prefer season 1 design.
Genos: they changed his facial structure, chin, hairstyle etc. this really made me mad cause i really liked the old design
King: design was really different compared to the last season, instead of having a wide face they made the face longer. It doesn't bother me as much because we didn't get familiarized with King in season 1 too much to get annoyed.
Fubuki: She looks a little bit childish (almost like a mature version of Tatsumaki), i prefer season 1 design.
Genos: they changed his facial structure, chin, hairstyle etc. this really made me mad cause i really liked the old design