well, it would've been nice for Barcelona to have a Penaldo on their team to score that pen in such a decisive and crucial and possibly game-changing moment, right? 
penaldo doesn't miss pens, that's why they call him penaldo
That is true but it wasnt very decisive as you make it out to be. Would have been 5-3 with still 2 goal lead. Wouldnt have been much trouble for PSG. There were still doubts just like the incredible comeback 3-4 years ago. penaldo doesn't miss pens, that's why they call him penaldo