Agreed with @Vanman. I looked at the repeatability files, but combined with multiple users spinning iso's and the BOM looking out of order (pipe IDs listed as 1, 2, 7, 3...) stuck a fork in it.
Revision clouding is... interesting. We don't use custom properties for tracking component revisions, instead we manage it automatically through the PCFs with the ISOGEN pre-processor. The clouds can get really ugly but like most things ISOGEN it's about convincing the checkers about accuracy and speed first, pretty later provided there is time.
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If you are going to fly by the seat of your pants, expect friction burns.