BackFire
Blood. It's nature's lube
Good decision imo. Constant interrupting in the first debate made it difficult to even know what was actually being said since they were just trying to talk over eachother. If one wants to call out the other for lying then they can use the time that is given to do to do that. That's how debates work. Presidential debates should at least function as smoothly as a high school debate.
Also while Trump will probably be pissed off by this it will likely end up helping him because some of his best moments were when Biden talked and kinda cocked up or said something that didn't make sense. Trump interrupting him like he did probably prevented Biden from saying something dumb.
Won't be surprised of Trump refuses to even agree to these rules in the first place and doesn't show up.