realize maybe the Animation change in miraculous was done on a purpose..so gabriel made a wish and Gimmi has the power to manipulate reality, granting wishes, but its effects can be far-reaching and potentially destructive and While the wish brought back Gabriel's wife, it came at the cost of Gabriel's own life. He was effectively erased from existence, leaving a lasting impact on the characters who knew him..soo with this logic when the universe was effected and caused a change in Animation..something like this was also shown in Ben10 omniverse.Remember that time omniverse straight up adressed the different artstyles and voices as a thing changed by celestial sapiens..so maybe gimmi also changed the artstyle of characters bcz Gimmi can change reality