So what you're saying is the stat is misleading because he's on ice ice for shorthanded goals against, and that doesn't mean he's bad defensively.
Ummm, the powerplay is designed to give the team the overwhelming advantage of having an extra player on the ice and the play start in the offensive zone. When he's the PP quarterback and he's on the ice for goals against that makes his defense even worse considering the other team has 2 forwards instead of 3 skating against him.
The team should theoretically not even be in their defensive zone if the PP quarterback is doing his job properly and either helping the team score a goal, or controlling the blue line and not allowing the puck to clear the zone.
I like Reilly, I have a number of Leaf jerseys and wears his the most as it's my lucky jersey, but he has been awful this year, straight up scary awful. Optimistically I even hoped Tessa would somehow make him a better skater, give him tips on how to be lighter on his skates, instead it looks like he's dragging around concrete skates out there compared to only just a season or two ago.
It makes me sad to see how badly he's regressed and afraid of how bad it's gonna get