I had a client do exactly this with a PT hub, and it was a disaster. The wheel got more and more inaccurate, and eventually the hub needed to be replaced.
It may well have been something other than the lacing pattern to blame, but the wheel was fine with the 32 spoke lacing and basically useless with the alternate lacing - and not salvageable by a rebuild with the original lacing pattern.
Back in the day, I saw more than one old Campy hub twist like a pretzel when laced the way you are asking about, and it seems reasonable to guess that the same forces may have been the cause of the troubles with this PT wheel.
YMMV, but IMO, better to avoid the potential trouble for a weight savings that is the equivalent of a mouthful of gatorade...
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