2. TBDBITL is bigger than it's director and will be fine.
While I agree with the first half of that statement, I'm not sure we have enough evidence to accept your conclusion. Consider that Waters was replacing a man who had been at the helm for decades, and that it was assumed on his retirement that there would be some adjustments - growing pains, as it were. Now less than two years into Waters' tenure he is fired... I think it will be very difficult, especially at this point in the "season," so to speak, so see someone step up and take the baton without some major challenges.
Long term the band will be fine? Probably. But I would say it's a bit cavalier to just assume that lopping off the head of the giant won't yield some deleterious consequences (in terms of the band's performance, that is).