While Mason certainly could have upped hid game... as all humans can... it is sad to think what could have been, given the right time and circumstances.
IMO, had he been used properly... in a manner that maximized both the Goalie and the Team... so that he could both carry the Team, when required, and not been run to the ground... and had the Team as a whole not had their collective heads up their that rumps for great stretches of the Season... and the Coach had coached more wisely... no telling what may have happened over the past four Seasons.
The old saying that you cannot have your cake and eat it to, to me describes the Goalie situation in Philadelphia... Mason was the new millennium's version on the Phillies 1964 Bunning and Short... or the 1993 Mitch Williams in a better analogy... he was overused and then vilified for coming up empty when needed most. We will never know know if the Flyers would have made the PostSeason had Mason not been run out there Game in and Game out... But IMO a better used Mason could have fared much better against the Caps... albeit it was also the Flyers' PK that let them down.
I believe that having a Backup... or 1B... who was able to stay reasonably healthy would have gone a long way in giving the Flyers a better chance to succeed.
The Flyers GM was a talented Goalie... so it's sad to see the way they are handled the Position... Seems like the Flyers sold their soul when Bernie won backstopped them to two Cups... Since those Cups they have been cursed at the position;
Bernie's 1976 injury and later his eye injury.
Pete Peters in general.
Pelle's tragedy.
Hexy's groins.
Chec-maniac's meltdown.
2010 PO Goalie injuries.
Leighton's disastrous SCF and the phantom CWG.
The Goalie Carousel.
Bryzgalov's signing.
Bob's trade demand.
Emery's injuries.
Neuvy's inability to stay on the ice.
Misuse of Goalies by Hakstol.
... What have I missed?