It's not McLellan's job to do what's best for Yakupov, but what's best for the Oilers as a whole. And for the moment, that is to put Yak with Lander and Slepyshev. I actually like putting Yak and Slep together because it can only help Slep, if only because Yak's probably the only guy on the team he can actually talk to on the ice, given the language barrier.
Also, these lines will make a lot more sense once Eberle's back. Him being out of the lineup is a large blow after all, it'd be like taking Filip Forsberg out of Nashville's lineup, how much difference would it make if he were not there?