I would really love to see the whole seat width/spacing taken up as a human rights issue. Damn, your dog would not be permitted to travel in the conditions every airline is forcing onto Y passengers. In a work environment you would not be permitted to be work under such conditions, but suddenly when you get on a plane for a 14 hour flight it is somehow magically OK? And if your job involves a fair amount of travel then the plane is at least your part-time work space.
My company is Y only so no point is discussion business/first as that isn't an option.
Back on task, I can't see this seat being a good idea, especially as it is squeezing the other 2 passengers out of 1", which is sorely needed already. Dumb idea. Just fix the issue. I am not overlarge and as other have said, it's my shoulders that don't fit in the seat, period, they just don't fit.