My most recent BW hotel didn't proactively mention my diamond status, so I casually asked if they do anything for diamond status. The front desk agent responded by asking if I meant Expedia status that's a thing?). And then finally he said "we don't recognize BW status". The hotel was acquired by BW 7 months ago and is marketed as a BW and the booming was made on the BW website.
Unsurprisingly they wouldn't even give me 30 minutes of late checkout.
Honestly what's the point of the loyalty program. If anything, it makes me less loyal each time one of their hotels disappoints.