Only reason I clicked was because until I saw the thread title, I had no idea the commercial had even been changed.... and wow, this went off the rails quickly!
Seriously, it's not something worth getting worked up about.
I understand what they were going for: the same bell ringing you've heard for 31 years begins so you think "oh here we go again lemme get up and - WAIT WHAT'S THIS?! Ahh, they got me!" So it's a play for the unexpected - a remix if you will - both tropes that often work to great effect.
But having said that... the synthesized giggle track and overlaid brass is distracting, compared to the refreshing elegance of the original bells which always stood out among the sea of loud formulaic commercials which this now just became. And after just a few years the "surprise!" element will be lost: what were they interrupting in the first place and why, what was the point? And where can I buy Hershey's Cubes shown at the end... is that a new holiday gimmick candy? What the hell is going on here?
What they should have done is use the heartwarming daddy/daughter baking footage to make a wholly new commercial that could (and would) stand on its own. Instead they took a timelessly elegant and flawless concept (that stood the test of time for 30 years!) and cynically double-dipped, creating a horrifically muddled mess like the product itself (Hershey's has gone way downhill since the bells first aired in 1989).
So, as a concept this commercial is not nearly as timeless or elegant. But as a novelty remix I suppose it doesn't have to be so, eh. It's just another commercial either way, just as it always was... and if you need a commercial to define your holiday spirit you have bigger issues. Because life goes on if you're fortunate... and in 2020 especially, a commercial selling crappy chocolate at Christmas is just about the stupidest possible thing to get worked up about.