Basically having a character moving while not moving is the issue? Why hasn't that been an issue with other games?I think it's the way the character moves. If it doesn't feel natural to the brain then your going to have problems. In rigs your playing a seated character inside a moving machine. The brain expects this and can handle it.
RIGS for example.
I haven't really seen Minecraft to have as much jumping around, as much speed.
I think there has to be other issues with it.
Minecraft could very cool in VR.