I reckon your take on Campbell is pretty accurate. But if you're a math guy I gotta imagine you have to be pretty nervous using these advanced stats to arrive at any concrete conclusions given the absurd amount of variables involved.
Your top 5 list doesn't pass the smell test. Leafs are not top 5, and they don't have a stronger D corps than say the Canes. Who are our league wide defensive stalwarts?
Lately we have fit the pond hockey mold and thats not because every goalie we put in the net over the last few years is complete garbage only with us.
We have no consistency, we buckle under adversity and our team defensive effort is up and down while our goalies scramble to keep with the tempo. Sounds like team construction and coaching.
The Iles don't have that particular problem.
Pond hockey teams don't give up so few shots/chances. Winnipeg, Florida, St.Louis, Ottawa, Vancouver and even Vegas were good examples of pond hockey type teams last season.
Again, a healthy Campbell put up the 2nd best save% in the league for almost 2 years with us. Is he the next Hasek or did the team D help him achieve those numbers?
Almost every single bad stretch of goaltending seems to coincide with injury issues. Andersen admitted that trying to play through injuries "wasnt the best idea" (hello .895 season) and it was learned with Campbell's bad stretch and ultimately time off that he was trying to play through an injury (.886 down the stretch). We all saw Mrazek blow out his groin a couple times too (.888 injury riddled season) and he was struggling trying to play through it coming back.
When healthy the last 3 seasons, goaltending has been good TBH (not great in playoff elimination games though dammit).
The Canes have been the corsi kings for years and gave up the fewest shots in the NHL this past season. Their only problem is they tend to give up a few too many chances of the high danger type. It was nice seeing a finally healthy Andersen looking like his old self a few months there before he broke down again. Much like us, the Canes have been looking for stable goaltending for years and keep striking out. From 2016-2019 they gave up the 2nd fewest shots in the league but had the 30th ranked team save % leading to a middle of the pack goals against. Now they finally have guys to stop the puck but they cant stay healthy. Good keepers that can stay healthy don't grow on trees though...
Think about it this way....
The Leafs gave up the 14th most goals in the league this season. That's not a great number for a contender.
Which of these things would you consider the reason for that:
7th fewest shots attempts allowed
10 fewest shots given up
7th fewest scoring chances allowed
9th fewest high danger chances allowed
3rd fewest expected goals allowed
22nd ranked team save%
With a healthy Campbell (On Jan.14th), here is where the Leafs ranked for goals allowed: 3rd fewest in the NHL (and thats with the awful Mrazek numbers)
The team didnt change how they played after that....Campbell did and has admitted as much (dealing with injury)
Anyways, enough rambling.
GLG!