When I saw that Arvidsson was replacing Nuge on the top line, my initial thought was that the Oilers want to have someone that will shoot the puck more than Nuge. Here is what I found, last year between McDavid, Hyman and Nuge, they had 736 shots for 104 goals with an average of 14.13 Shooting %.
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If we look at this year so far, here are the actual results from those same 3 players.
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Note that the combined shooting percentage from all 3 players has only dropped 0.2% since last year. The largest decrease from last year's shooting percentage is Hyman who went from 18.62% down to 13.19%. Part of this is to be expected but what's interesting is that both McDavid and Nugent-Hopkins have seen their shooting % increase this year.
If we pro-rate the rest of the year (assuming all 3 players play the remaining 28 games) we can see that despite the shooting % remaining relatively the same, the total number of goals has dropped by 16.
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As you can see the trio will have played basically the same number of games (234 instead of 236) but the shot total have gone done by 107 and the number of goals have gone done by 16.
McDavid is averaging 0.34 less shots per game this year.
Nuge is averaging 0.25 less shots per game this year.
Hyman is averaging 0.69 less shots per game this year.
The TLDR is that if the top line of RNH-McDavid-Hyman isn't shooting the puck enough as a group.
So even Nuge has seen the smallest variance since last year, he is still the lowest number of shots / game out of the three. Although Arvidsson is having a down year in shooting % this year (only 7.4%) he actually averages about 0.4 more shots per game than Nuge.