after reading a few posts on here on this topic I went out and tested this for myself today, so I wanted to share the results.. which are VERY positive!
On this forum I read people not having much joy or certainty about the MP being able to follow a subject up AND down a hill.
I used my Mavic Pro, GoPro 3+ black, Feiyu Tech WG Gimbal and GoPro 5 black to shoot a self made edit in 1 day. Really happy with how it all turned out!
Settings I used (firmware update defaulted the camera to settings I wouldn't normally use resulting in not ideal footage):