I made some onward style movement in c++ just the other day,
Maybe you can translate something similar to blueprint.
Just figured id share here seeing as we were talking about trackpad movement 
Thanks again for the awesome plugin
// Move forward/back
void AProtonCharacter_VR::MoveForward(float Val)
{
if (LeftMotionController && Val != 0.f)
{
//note: i tend to actually grab a bunch of info like during tick. put here for convenience of sharing...
if (LeftMotionController && VRReplicatedCamera) {
LeftHandCurrentPosistion = LeftMotionController->RelativeLocation - VRReplicatedCamera->RelativeLocation;
}
//rotation/direction is from rotation of controller
//you still need to deal with actor/control rotation in your project
// is just to generate movment :)
const FRotator Rotation = LeftMotionController->GetComponentRotation();
const FVector Direction = FRotationMatrix(Rotation).GetScaledAxis(EAxis::X);
//FORWARD is scaled by distance of controller from camera
if (LeftHandCurrentPosistion.Size2D() >= 10.f && Val > 0.f) {
const float TrackpadMoveScaled = TrackpadMoveScale * LeftHandCurrentPosistion.Size2D();
float NewVal = Val * TrackpadMoveScaled;
AddMovementInput(Direction, NewVal);
}
//BACKWARD is not scaled from camera
//and is nerfed down to 0.25, walking backward in vr sucks....
if (Val < 0.f) {
float NewVal = Val * 0.25f;
AddMovementInput(Direction, NewVal);
}
}
}
// Move left/right
void AProtonCharacter_VR::MoveRight(float Val)
{
if (Val != 0.f && VRRootReference)
{
const FVector Direction = VRRootReference->GetVRRightVector();
//strafing in vr also sucks, so is nerfed to 0.25...
float NewVal = Val * 0.25f;
AddMovementInput(Direction, NewVal);
}
}
Then you can just assign the axis in your project settings, and pass through to your character from your pc as per usual…