It's a fair point, and a price premium does a good job of emphasizing the sporting chops of the coupe over the open-air experience that normally entitles convertibles to higher MSRPs. It's unclear just how closely Jaguar will follow Porsche's example, though.
Both the Cayman and Cayman S boast an extra ten horsepower over a Boxster or Boxster S, and while this bump in grunt is negligible in every situation but an argument over which is "best," it isn't something to be ignored in the F-Type, particularly as cranking more power out of its supercharged engines should be a rather simple matter.
Drive also points out something quite exciting: with an F-Type Coupe on the way, the groundwork has now been laid for a dedicated R and RS model. We can't wait.