Actually, the Flyers aren't playing bad, they're leading or close to the lead in fewest shots allowed.
They have too many breakdowns leading to good scoring chances, but a lot of that is playing young players (Konency, Sanheim, Hagg, etc) who make mistakes.
The goalies are the #1 issue, when they play like above average goalies the team is competitive with anyone, when they don't make big saves the team is still in most games. When they give up "Mr. Softee" goals the team is in trouble.
The second issue is they miss MacDonald, sometimes it's not how good a player is, but how well he allows teammates to fit together, Provorov doesn't look as good without MacDonald on the defensive end. But if you put Ghost with Provorov, Sanheim is the only other puck mover, put him with Gudas then you have Manning/Morin with Hagg. Not as balanced, and that third pair becoms an adventure (and no, Morin is not going to be a huge upgrade over Manning THIS year, he'll make more than his share of mistakes, especially if you don't have a veteran to pair with him).
The third issue is growing pains, the kids aren't alright, they're making mistakes and will continue to make mistakes. Ideally, you want a team full of 3-4th year players who have experience and are entering their prime, we're 2-3 years away from that point. So live with it.
The team is more talented than last year, it's playing better than last year, but it's a transition year (and the same will be true next season when they have 4-5 more novice starters).
2017-18: 2.50 ES goals per game - sv % .897
2016-17: 1.88 ES goals per game - sv % .905 [88 points]
2015-16: 1.89 ES goals per game - sv % .920 [96]
2014-15: 1.82 ES goals per game - sv % .914 [84]
2013-14: 2.04 ES goals per game - sv % .912 [94]
2012-13: 2.17 ES goals per game - sv % .905 [49]
2011-12: 2.29 ES goals per game - sv % .906 [103]
2010-11: 2.37 ES goals per game - sv % .915 [106]
2009-10: 1.94 ES goals per game - sv % .907 [88]
2008-09: 2.11 ES goals per game - sv % .914 [99]
2007-08: 1.80 ES goals per game - sv % .915 [95]
2006-07: 1.77 ES goals per game - sv % .892 [56]
2005-06: 2.00 ES goals per game - sv % .896 [101]
2003-04: 1.91 ES goals per game - sv % .912 [101]
2002-03: 1.90 ES goals per game - sv % .920 [107]
2001-02: 2.28 ES goals per game - sv % .913 [97]
2000-01: 2.12 ES goals per game - sv % .907 [100]
"Conservative" Hakstol has the team scorng at ES at the highest rate of the century.
Now if Hextall could just find him a decent goalie!