I don't see any reason that Tua shouldn't be the shame but it was super nice to see him respond to the pick six by going the field and scoring another TD. That's something good QBs can do so I see it as a great sign.
Marino had plenty of bad moments and bad days, but with the foggy mist of time a lot of people seem to have forgotten them...
You hear time and time again from some of the very best players in the NFL, one of the best aspects of a truly elite QB is selective amnesia - the ability to forget the shit that just happened and immediately respond. Johnny U had it in spades, as did Marino, and Montana (not that I can recall he had that many fluffs to begin with), Elway, Farve, Manning (x2 - yes I said that), Rodgers, Mahomes, and of course Brady. Compare that to Matt Ryan - the definition of a downhill skier, who would have had a career as unremarkable as Chad Henne if we drafted him instead of Jake Long (although I guess he should then now also have had a Superbowl ring - as a backup).
It's very early to say that with Tua, but I'll just say that I liked the way he responded to some very poor moments in this game - and a lot better that what I've seen from Herbert & Allen after they fuck up royally.