The previous Acadia was a pretty big rolly polly thing. As Fob is fond of saying, might as well just roll with a Yukon. This new size will be closer to what the market seems to prefer.
Except there is a big price jump to get in a Tahoe or Yukon.
The interesting point here, to me, is that the Traverse and Acadia were selling well. In fact, the size of the Traverse is what made the sale for me. Moving up to a Tahoe was a no go, as the Traverse was already stretching the budget. The Lambda vehicles ARE big. Which, for people looking for big, happens to be very good.
So GM had the XL sized crossover market all to itself, and now they are going where everyone else is. I suppose the sales figures will tell the tale.