I think you've misunderstood the change, Kruhl. This was a retroactive change. All items with Dispersion that were intended for cloth classes only will proc at a much reduced rate if worn by a non-cloth class.
I think the confusion occurred in that the two messages were slightly contradictory. Disregard the first message, and just go with the second.
LINK
(Fyreflyte) Re:New patch notes - worrisome trend.
