If so few users are in excess of the usage limits, why make the change? It appears the change is arbitrary in order to force users to migrate to a higher priced option which coincidentally is a relatively new product.
This reinforces my decision to recommend QBO in only very specific select cases as the customer has no control over QBO verse Desktop. At least with the Desktop version features are not taken away (if they are, people won't upgrade to the latest version). I know users that stopped upgrading the Desktop version due to the password requirements which were added. The biggest reason for upgrading Desktop is payroll and with so many other providers, this isn't a big deal.