I dunno... I'm not a huge fan of Arvidsson, all too often his game reminds me of a former 1st overall being chased by bees. Everything he does has a certain anxiety to it, all frenetic energy with very little thought put into actual execution.
Having said that: he played well last night, with his forechecking actually producing some possession and his goal was far from a fluke. Unlike normally, he actually cleanly received the pass and was putting a solid shot on net rather than a frenetic, high-wide one-timer. That's a welcome change.
You can say the shot was a product of the deflection, but to me it was a minor deflection, with Arvi powering through that late-arriving stick... and if anything that just angled the shot slightly higher. IMO it was likely 1) on net, just lower) and 2) a goal unless Shesty made a miracle happen... he wasn't over or set, so a decent shot to the upper half of the net had a high probability of going in, slight tip or no tip notwithstanding.