It's almost impossible to find a franchise goalie, and I can count on one hand the number that are in the league today.
Murray was arguably the top goalie prospect in the world who set records in the A before his call up last season. This wasn't some guy that got hot at the right time. While he isn't a franchise goalie yet, he has all of the tools, especially the rare mental makeup he possesses.
When he was pulled for game five agt TB, it was utter BS and game four of that series was literally the only poor game he had until that point. Sullivan felt pressure to play MAF I'm sure, and that of course was a poor decision. Murray went back in under enormous pressure, in a can't lose situation, for game 6 and 7, and he won both.
Getting unfairly yanked on such a bright stage like that would be a mind**** for most young goalies, but Murray has always had a calm demeanor and you simply can't teach the kind of elite mental game he has.
That's why a Draisaitl for Murray swap isn't even close to tempting, despite the humorous jokes above over said value. Draisaitl is a nice looking pivot, but there is nothing about him that makes me want to see the Pens give up a potential franchise goalie for.
I honestly don't know what it would take for me to feel good about the Pens moving Murray, but Draisaitl is certainly not the name.