Gio was playing fine though, no?
To your broader point, yeah. You want to see signs that the player just needs sweet sweet regression to the mean though. Hall was shooting 2.3% in Buffalo before the trade and there really wasn't much wrong with his assist rate (oish% was a bit low, but not much). There was really only a few possibilities. 1) Taylor Hall has forgotten how to shoot a hockey puck after a decade as a 20-30 goal scorer 2) Taylor Hall is playing with an injury that makes him unable to shoot a hockey puck....easy enough to spot with pro scouting 3) Taylor Hall has been super fucking unlucky and will regress to the mean eventually.
Kane's shooting % is low this season, but it's not crazy low compared to the last few years (which makes this look like a general decline in actual shooting skill) and his oiSH% is also a bit low by Kane standards, but not crazy low (about 2% off of normal Kane).
This just looks like the general decline of Patrick Kane tbh. Pass.