Also one thing this series, and especially Game 3, has helped show is how much noise there is in small-sample expected goals metrics. Take Kane's three goals last game:
Goal 1: 5v5 2-on-1 pass, deke, backhand shot from edge of the crease to nearly empty net
0.10 expected goals (10% probability) per Natural Stat Trick.
Goal 2: 5v5 partial 2-on-1 pass, backdoor tap-in to nearly empty net
0.12 expected goals
Goal 3: 5v5 2-on-1 pass, partial breakaway deke
0.15 expected goals
Subjective, but I don't think any of those probabilities are even close and in my opinion the third was easily the most stoppable.
These things, of course, mostly even out over a sufficient sample but there is a ton of noise in fewer than 10 periods of hockey in which a larger-than-normal portion has not been played at 5v5. Don't discount expected goals - in fact they should be used whenever possible - but proper context is always vital with these things.