Do You Guys Think That If We Keep Complaining About The Finale, They Can Actually Change It Without Re-Filming?

I don't think they would refilm the finale. However, I feel like they left an open door for new A on purpose. We all know that there will be a new A but what if it was a stage for a back-up plan, in case majority of audience got disappointed? Like they will reverse the new A as actual Charles and make CeCe a decoy hired by Charles?