Hockey Twitter does the same exact thing they bemoan traditionalists for. Blindly screaming for “More speed more skill” is no different from “more size more toughness more deterrence” imo.
One can debate what the right mix is. For some cup winners (Pittsburgh, Tampa), it has been fewer than others (St Louis)
But however one feels about the right mix, there is no debate that the Penguins don't have it.
Look at the B2B Cup warriors: Bonino, Cole, Hornqvist.
Not guys who will hit per se. Not guys with size per se. Warriors.
You need guys like that to win cups. Not just in their own right but also in terms of how that attitude affects the rest of the team.
The Pens have none, because they never replaced the ones who they had.
EDIT: I remember years ago Burke talking about Chris Kunitz. Loved him as a player. Called him a swiss army knife, a guy who can do anything you need him to do to win. The Pens also lack for swiss army knives.