Glad it helped you. Now to the problems you have had. I had the same.
Regarding weight maps. I've leaned to have them regardless. And it all depend on materials construction. For a garments with a single material, there is actually no need for the map and iClone would not even ask you to provide one.
For garments with 2 or more materials, some fake map is a must, otherwise iClone would crash as you've learned. I did not test too many garments, so there you have your chance to play with it. Better yet wait till official alembic import support, which is coming to iClone soon.
Regarding FPS. It is actually 60 FPS if you look at my workflow. I do *fake* it though. Yes, MD imports at 30 FPS. Then I stretch timeline x2, then (important!) export from MD as 30 FPS (not 60).
So when I import Alembic, my soft cloth track is twice as long as the original animation. Then I *compress* the track and make it even with animation. Now I have 60 FPS.
I did scroll the scrabber by frame and cloth changes at every single frame, meaning it is actually 60 FPS and there should not be any discrepancy with MD. At least I have not noticed any in my tests.
One more thing to remember. iClone timeline starts at frame 1. MD at frame 0. In the video workflow, I have compressed soft cloth track to the same frame as in MD - 580. But it's actually should have been 581 for complete accuracy.
:Whistling:
Update: The latest related to alembic import FPS: https://forum.reallusion.com/478218/Alembic-ImportExport-MD-to-iClone-FPS-30-or-60--and-more?PageIndex=1