Laine was Late to come back on Deangelo , he had a good effort to come back but he pressured the same area of the ice as Hutson in the corner in the offensive zone. If he didin't commit so hard offensively he would have been able to catch up to Deangelo and allowed Suzuki to take the shooter.
At 4:50 you can see , Laine makes a useless fly by on Hutsons man , He did not have to commit there ,
At the end of the day it dosen't matter , its 3 on 3 , and like you said Laine had a great backcheck effort , he was just caught too deep offensively so he was late