Fender went to the 3-knob VVT system probably (there's no real documentation of exactly why) because the 3-knob system uses parts that were common across almost all the instruments they were making at the time, and because the stacked knob originals used resistors to prevent the controls from interacting. Those resistors also reduce the output. When Fender started the Vintage Series in 1981, they elected not to use the resistors. The controls on the VS '62 Jazz interact now.
No reason to avoid getting one just because of the control setup. If you don't like it, they're pretty easy to convert to other controls.
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"Without space, music is just noise piling up on itself." TRK
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Lakland Owners' Club #248