Two points:
1. IMHO, reading online reviews is not a reliable way to assess a property. Less than 1% of guests that stay actually fill out the official brand post stay survey let alone something from Trip Advisor or Google which dilutes that into a fraction of a percent. It's highly skewed towards the negative and IME, a lot of the negative reviews are filled with hyperbole, lies and half-truths. . . . . .
I'm not debating there are isolated revenge posts because somebody didn't get the comp upgrade to a multi-room suite. But if there is a running thread of negative reviews in substantial numbers on Tripadvisor, especially if it is a marked departure from the past, then I'm thinking avoid this place.
I'd give even greater weight to a two or three thoughtful and well written posts on Flyer Talk, written by people who are regular participants, who clearly articulate reasonable disappointments.