Well I'm no survivalist but that notch is in a terrible place. I do analyze stresses in metal and that notch better be very useful because it weakens the metal a lot. Saw teeth would certainly be more shallow than that notch and the stress concentration factor is very dependent on depth. (a little deeper is a lot worse) Paradoxically having a bunch of saw teeth wouldn't be worse than that notch just because there were more of them. The saw tooth knife would still only break once, those saw teeth wouldn't all add up.
Ron Hood sounds like he knows what he is doing, I'm not saying the notch is useless, and if Buck will replace the broken ones God bless them. But it weakens the blade a bunch.