Hopefully this is Kassian in the future. As it stands, I think Pominville performs his job quite well. He benefits from Vanek, but the vice versa is true too. He's contributed to 31 goals on the young season. That doesn't just randomly happen w/o playing well.
The 1st line has held up their end of the bargain. If the same could be said for any of the forwards, the team would be well above .500 and I don't think Pominville would be hearing any criticism.