Don't think so since there are no signs of open bite or gummy smile.
He has obvious lip strain in the before (his lips are open int the pre-op ceph). But not showing their patients smiling is kinda dishonest, considering how important a smile is (I bet because he was over impacted and now has too little tooth show in the after).
To change the occlusal plane angle, you have to alter the maxilla in the vertical dimension - impaction, downgraft, combination thereof.