Consider using the transMaps for the lashes and Upperbrows. With your P4 figure, you used an expression morph to define the arched brows. You may consider doing a morph on the upperbrows to acheive this, if you have not already. If you are a convert to ditching the brows all together, and using only the Upperbrows, I don't know if you need bother with morphing the brow mesh or not. I would try just the Upperbrows first to see.