Suite is indeed useless. I wasted an expiring DSU on a 1-night stay and spent no more than 15 minutes in the connector room.
Given the set-up, I can't imagine anybody is upgraded to a suite. They are simply sold to people who might want a second room due to family size, etc.
As mentioned, this property is nothing special, but stay for 1 night pre Whistler and 1 night post, with the lounge closed, and that's 3500+ points per night for Diamonds plus a decent restaurant breakfast.