I wonder how it would look if you'd use twixtor or similar plugin to convert video to 60 FPS?
Not familiar with twixtor but here is a comparison with left: ReelSmart motion blur (standard version as AE plugin) with the original 30fps and right: standard AE pixel motion frame blending 30 to 60fps (the mpg is 60fps but the left side has double frames to be able to put it in one video).
some distortions on the right side.