Ok. I got pre confirmed 2br suite without using a DSU. And they were very accommodating IMO. Don't expect free kosher breakfast, though.
My experience overall - whether a 2BR came with it or not - was poor due to specifically the management and workers that were here during my stay.
Rude, accusatory, non-caring.
I believe those are all important things especially when it comes to being a diamond.
I did get a 2BR without a DSU but the way it came to it and the overall stay, I would've definitely preferred a 1BR with a great guest experience.