The one issue with phase problems, to me anyway, is if I'm sitting in the "sweet spot" and just move my head a few inches left or right, a single vocal or instrument may move several feet in any direction. (usually left or right). That creates a huge break down of the soundstage for me as I find it quite annoying. My latest speakers which are Vandersteens don't have this problem thank goodness....
Tim
A large relocation of images when you move your head is often related to speaker separation - not saying that yours is excessive, simply an observation that it is most often due to wide separation.