He was very good in 3/4 rounds, they got a little lucky that in the one round he was shit in, Washington also had terrible goaltending (poor Ovy).
But in the 2009 Finals, particularily the last two games, MAF practically carried them over the top. If the NHL had a Finals MVP like the NBA does, MAF probably wins it.
Beyond that "average" would be a large upgrade over Skinner, Skinner has some of the worst playoff stats in the modern history of the game, we're talking right next to Dan Cloutier.
The Oilers are to their credit becoming a lot more like those Pittsburgh teams in play style. They are getting there. It's just because of a lot of managerial incompetence that it's taking a lot longer to build a similar level of team for McDavid. 5 million on Campbell who's not even playing, 3 million overpaid on Nurse, still 2 million in dead cap from the Lucic/Neal fiasco, that's 10 million in cap space that could buy a lot of depth.
That's not McDavid's fault, that's the fault of his GMs.