Ok guys so I did the Test… and luckily I started testing on a normal Road first.
Test 1 (Current Hyst Reverse with Brake with 2km/h Limit in VESC Tool)
I accelerated normally - braked - everything seemed fine. Hit the brake another time - slowly going backwards downhill towards the road. I thought OK sweet - now hitting the throttle again - no response - hitting the brake again no response - slowly rolling towards a Car so I had to steer my board to the sidewalk.
What the F? 
I changed the ERPM for Direction change several times… 1000… 2000…3000… all with the same results… Ok SCREW this mode for now.
Test 2 (Current Mode with 2km/h Limit in VESC Tool)
Did the same test - however when braking I noticed the wheels would spin a little backwards sometimes but a lot more controllable then I thought… Feels great actually. 
I went very steep downhill and could stop comfortably every time. The reverse feels a little bit cloggy at times because of the speed limit but it does it’s job.
So Solution for my Problem:
Set my VESC to Current Mode - Limit the Reverse speed to 2km/h
Just one more question, how do you guys feel about Traction Control ? Does it help you or is it counterproductive ? Which settings do you recommend ?
Short Video from todays ride:
Cheers
Patrick