I have to agree, unfortunately about the Ritz Carlton Shangahi. The hotel has the best location in the city- and thus they do not seem to need to worry in order to stay at 100% occupancy. On a stay in August of this year I was led to a floor under construction- and when I mentioned this might be distracting for me as I was working long hours- they told me not to worry as it would be finished in a couple of days. I was eventually moved, but only after asking twice to speak with a duty manager. The F and B service is really variable- in the Japanese restaurant service was very attentive- in other venues actually quite a disaster.
This hotel used to be the shining star of Shanghai- but seems to have continually declined- I would recommend either the FS Shanghai or the Pudong Shangri-La- depending on what your plans are in Shanghai in terms of work/pleasure.