Actually, the Butler comment is pretty funny.
McGrattan of course can not play defence as well as Butler, but Butler can't be a 4th line grinder/enforcer either. They both fail.
However, McGrattan is a pretty darn good enforcer in this league, and is passable as a 4th liner. Butler is seemingly not a passable 6th defencemen. Before the 'like to see someone else play with O'Brien' comment, Butler looked pretty lousy with Bouwmeester too.
It is funny how arguments erupt from just a simple little bait that should be ignored, and evolve (devolve?) into such funny tangents.
Carry on