No it's not. Flyers aren't the best defensive team. They've also let in 6 against ANA and NSH earlier in the season as well (7-6 in this game, but last 1 is just SO pt.). And also 5 to NYI, OTT, SJS, PIT (twice), WSH(twice). VAN, NYR, NJD and TB in their previous meeting (obviously with a different goalie). They're kind of the high powered offence with young D still learning. It's why I don't think they're going far in the playoffs.
I feel like this is a bit of us having Mrazek under the microscope. I mean, It was a 6 to 6 shoutout game so Vasilevisky did just as badly. And he also has 10 goals in the past 2 games. And he's probably among the best goalies in the league right now? (Rinne probably) Are Tampa going to bench him for the rest of the season? Some off games or high scoring games just happen. I watched the 2nd half of this one and he wasn't really bad, but his rebound control remains one of his big shortcomings.