My wife and I did used the Victoria cruise down the Yangtze a few years ago.

This was PRE three gorge dam completion but it was a good rest for us. The shore excursions were not exhausting and were interesting enough.

If the goal is to get some R & R, its not a bad way to go.

If you do a search for yangtze cruise, there is a thread about this (I'm too lazy to look for it myself)