I did, and yes you also had to make the read on which way to to attack because if the opponent did block the right way he could've punish you. Even in 50/50's you can be very predictable as the attacker and if you were, the opponent could've figure you out and punish you. That's why both players had to make the read. And yes they were some unreactable options but not all of them, but you still couldn't have to just go ham and do random stuff, unless your opponent was a very weak player.
Sub-Zero's B2 is 18 frames, only reason it is scary was because of the Klone, Tribrog's overhead also isn't that fast, Kotal has no mixups but only staggers as he has only B14 (Mid-Low) or B122 (Mid,OH,OH).Also did Johnny's D3 or Lao's D4 could've combo into anything?
And what are the supposed unreactable 50/50's for the rest? Are the options really that fast on startup (therefore you can't react to them) and/or safe on block (therefore you can't punish them)? And their options can lead to full combos? And is this true for both of their options or just one of them (Oh or Low)? Erron Black, Ermac, and Mileena might have been the only ones that fit to these categories. And regardless, just like I said, both players had to make the read, not just the one on defense. If you were predictable with your offense, it you would've get punished.