because you ignore that every single player in the league has stretches where effort is lacking, you just choose to harp on Krejci for it.
you also make the error of assuming that because he doesnt wear his emotions on his sleeve, he isnt involved or trying.
Effort doesnt require making gritty faces or having outbursts
I harp on DK for his lack of effort at times because of the money he makes and his importance to the team. You don't see me in here pissing and moaning that Acciari's effort sucks when it does because it doesn't really matter. As the team's highest paid player, he's expected to deliver, whether you think that's fair or not. There are high expectations on him. When he's engaged, the team rolls. When he isn't, the team struggles.
And again, I'm not talking about the usual mid season doldrums or slump because of the grind. I'm talking about sub par play. Peeling off early instead of pursuing the puck. Taking shortcuts, curling off early when entering the offensive zone, not hustling back on d, not skating hard on transitional plays, not finishing checks, avoiding taking hits to make a play, etc. The kinds of plays that show up as effort plays. Not just having a bad night or two.