I play SnD in hardcore mode (only this mode ^^) on PC.
BO 3 is one of the real good CODs.
First I thought, omg another future jumping setting and what are they doing with my fantastic Blackops series.
But they did a lot just right.
I didn`t feel like a from console converted PC game. This feeling I had with AW (or Gh... bahh Gh... Ghosts).
It is as smooth as BO 1 and 2. It is fast, but no super rush gameplay.
For sure, if you are able to manage to use the wall running and your jetpack, you have more advantages, but you don`t need to use it exzessive. I have shot down many "birds" ^^.
Perks and weapons are very good and balanced (HC mode).
Just one thing is not so good.
When you start, you have to reach level 50 to get dead silence and without it, it is like walking on broken glass. Now it will be a hard start, because lots of people have more experience and are above level 50, but once you reached it, you will enjoy it and feel a huge relief, when you can use it.
So don`t think everywhere is a cheater, just sound-XXXXXX.
Enjoy it!