Agreed, though I don't find the somewhat underpowered built in ND to be a problem in actual practice. When I'm shooting under bright sunlight, I almost always have a polarizing filter on anyway. I just like the way it keeps the sky and reflections under control.
Agree, but when conditions change, light to dark or vice-versa, you might have to stop and remove the filter instead of flipping an ND switch or in this case rolling the ND thingy. Not a huge deal, but if you have to change back and forth on the same scene, it will ruin your continuity.
Grant