Thank you for this viewpoint. Agree entirely that Sierra offered no new compelling features.
Actually, for my workflow, no new features of interest or value. So will take your advice and stay with El Capitan until we see what 10.13 offers. Especially as DTTG updates continue to provide all enhancements to 10.11 - and hope will continue to as we move through the first iterations of 10.13 which could well be as bug prone as 10.12 continues to be.