The Enyim wiki documents how to enable logging and some other things. I'm not sure if these are supported in the same way in the Couchbase Client Library or not. I didn't find any mention of logging in the current Couchbase client docs.
These pages have most of the info I think is missing from our Couchbase Library docs:
The last one talks about IMembaseClientConfiguration, etc. Telling users how to customize and subclass the client library interfaces is important.