I like light flywheels period. If it means a JWT unit on a medium or large turbo, then great. I like them because they make the engine livelier, they make heel-toe shifting and all rev matching much easier. These are things I value a lot.
They do tend to cause traction issues on turbo cars because they allow more power to reach the road. If you were struggling for traction before at low rpm you will be worse off with the flywheel. I can live with that. I found a pedal on the floor to the right of the driver's foot well that seems to control the power output of the engine, so I use it to control the increased likelihood of wheel spin. If you're not familiar with that pedal, you might want to stick with a heavier flywheel*.
The light flywheel is tied for the second best mod I've ever done. I can't imagine life without it, turbo or no.
*And in some cases, strictly speaking, you will be able to obtain faster ETs at the strip with a heavier flywheel because humans are only so good with their right foot.