There is an antivax left that might have been more empowered, but guys like Robert Kennedy Jr. are already out running antivax things and calling people hitler right now so I’m not sure how much of a difference you would have on that.
A much bigger question is what we would have done had they tried to release then last September, before the multi month safety and effectiveness trials were in. I don’t think I would have taken it then, not without data showing it worked and was safe.
Also worth noting that the manufacturing and distribution were a bloody mess on January 20, so it might not even have been a question for most people.