You doubtless pondered over this when transitioning or installing the 2015 version. If you were transitioning, should you commit to not only the manual but the mandatory six through the jaws of your shredder as well. (Yes, I know Preventive Action went anyway but let’s run with it yeah)
In reality, having talked to my sites during that period, they were retained as useful documents and the temptation to run amok resisted. It was a bit like some of us being allowed to get our hands our pension pot to do with as with please isn’t it. You so want to but you hold back. But what of companies getting certified for the first time with 9001:2015?
The manual if written properly (i.e. in say 8 – 10 pages max) is a good marketing tool and the procedures are useful support for those getting their heads round the requirements in QA.
As for the rest that really depends on the skills and knowledge of the team who will look after these processes. In my opinion, if they know them inside out then there would appear to be no need to burden them with procedures provided adequate records are being retained to evidence control of each process.
However, if they are lacking experience, there is no doubt that there is a good case for writing them. As with all parts of the standard – if not having a procedure risks the process falling over, then you need one.