In fact, I would argue, the Oilers benefited from seeing LA's strategy on the powerplay; in particular, their use of 5 forwards, all of whom also kill penalties.
As the guys on GYB pointed out, that is going to be a tired powerplay unit, given they are doing double-time on the PP and PK.
Maybe even more interestingly, as they GYB guys also pointed out, LA's use of 5 forwards is an ideal set-up for the Oilers to use McDavid on the PK. Even the best defensemen have trouble containing McDavid and staying above him, never mind a forward. If LA wants to use 5 forwards, then McDavid can attack that top guy and will absolutely generated short-handed chances. Adrian Kempe stands zero chance trying to contain McDavid on the blue line. Zero chance.