I've completed my experiments with the blend idea. They are very disappointing. The skips are just as obvious if slightly attenuated. The improvement is nowhere near enough to justify itself.
So I just went ahead and fixed the existing version, resulting in version 1.0.1:
http://neuron2.net/fdecimate/fdecimate101.zip
For those wondering how FDecimate() differs from ChangeFPS(), it can preferentially deliver unique frames, avoiding duplicates where possible.
I don't see a fully acceptable solution to Zep's problem short of a coordinated adjustment of the audio.
@didee
I tried to run your restore24 scripts but I got an error that the script wasn't returning a video clip and I didn't have time to to track that down. Also, there was a syntax error on a levels call, so apparently this script had never run. Anyway, please try the fixed version and report back. Thank you.