gilbertaue you make me really want to return to what has always been (since it opened) my favourite Accor hotel in the world. Having said that, I've found the same issues you have had, except for my very first ever stay where So Paul sealed the deal for me wanting to stay there by the most exceptional service I have ever received. Having said that, it was only about 2 months old and he treated us like royalty, but it made the hotel my favourite - but it's never lived up to the experience I had that first time.
But it's my go to in Bangkok every time.