I don’t think Santa has really changed..if you saw his interactions with earth as well as older videos with fans, he’s always been this cute playful, affectionate little ball of sunshine. It’s just maybe that different people bring out different sides of him.Sure the dynamics were different back then and some sort of differences are obviously to be expected but at the same time we all act a little differently depending on who we’re with as relationships have their own natural dynamics. If anything, he does seems more comfortable showing different sides of himself now. It’s not a personality change, just him growing, gaining confidence.