Demo has been the by far hardest Lock spec to play well every expansion since WotLK. If anything, Demo has always been the tryhard overachiever spec.
On topic:
I actually find the Legion version of MM to be quite fun. The only thing I don't like, is that it no longer has Chimera Shot, which has been MMs "iconic" ability for 4 expansion. It's the first expansion since WotLK where Hunters actually require some skill to play, and the current state of Hunters is also the best it has been since WotLK (WotLK MM is still one of my favourite specs ever).
100% Freecasting while moving was the most retarded designdecision of all time, and it made me abandon my my by far most played alt up until early Cata. Sure, I always lvled it and played it once in a while, but it never became an alt that I actively played during those times.