I've been waiting for someone to ask this directly. While I was excited by this new prop shader, I find the implementation to be lacking, particularly in how harsh shadows can create stroboscopic effects in daylight. It also does not allow for as fine artistic control of how the propeller looks when it's spinning, such as the sharpness of the paint lines and the shine of leading edge dings and scratches.
I look forward to embracing this technology when I think I can achieve the results I'm looking for. When that time comes, it will take days, or possibly a week to implement across my whole fleet, but hopefully it will be worth it for the results. I will probably offer both versions of the effect, toggleable on the tablet options page for those who still prefer the old effect.