I don't think having the Worlds in August is a problem, historically Worlds were placed in the second half of August until the 1995 calendar reshaping so it's almost a return to the original slot. The problem is fitting every single discipline in the span of 10 days, a pacing even worse than Olympics with more disciplines in less days (and Olympics are already really cramped) that basically prevent multidisciplinary riders from riding more than one or two events.
Historically, MSR and De Ronde were held on the same day, that doesn't mean it was a good thing.