They're not classed as equivalent to a mainline Deluxe, and never have been. They have always been sized and priced mid-way between Deluxe and Voyager.
US RRP for Deluxe - $13
US RRP for Crossovers - $16
US RRP for Voyagers - $20
(and the Crossovers price was actually closer to Voyager, when Deluxes were $10 before last year's price rise)

Compare Crossover toys to regular Deluxe and Voyager vehicles of the same shape - most are alot closer to the bulk/size of Voyager toys.

Here in AUS, our Deluxes are between $25-30, and Voyagers are between $40-50, so stores here are pricing them accurately at $30-40 (the same mid-point as US RRP).