I doubt that audibility was the main reason for The Wooster Group radio mikes. Different microphone techniques are frequently used, as part of their multi-media approach. From reports, they seem this time to have contributed to a relentless flattening of the spoken text. Often, they serve to separate the speeches from the speakers so that text becomes an element in the theatre experience rather than an integral part of an acted character, as in the "traditional" RSC convention. They sometimes display text visually on rolling electronic display.
I haven't seen this yet, so I can't judge it, but it does seem that what you call "flaws" are actually "features" of The Wooster Group. It may be "worst" in comparison to "traditional" theatre, but it's a different beast to that so I think it's pointless to look at it on those terms.