I do share some of the disappointment with the choice of Spit from the perspective of 'a matched confrontation' and it is fair to say, I think, that for many of our fellow pilots this is what they are looking for, perhaps as it then gives indication as to who really is the better pilot.
DCS has never really been singularly focussed on the equitability of the air-duel, much stronger is its obsession with high fidelity cockpit coupled with advanced systems modelling and real-life flight data matching within the flight model.
This I find totally praiseworthy. Also we do need to bear in mind the various undisclosed parameters and discussions that invariably happen within ED as to how the sim should be configured. They may well have their own very good business reasons governing their final selections and choices. This WWII project began in Luthier's disreputable hands and ED have taken on what he started. I think that has a knock-on into what we see developing now. So be it.
I, myself, spend a lot of time flying within DCS offline simply for the pleasure of the aircraft itself. I love the dedication to authenticity displayed within both ED and the 3rd party developers, bring it on VEAO and your Spit Mk1V!
The Spit LF MkIX was in many pilots' own words the best flying of the many Spit marks, Al Deere regularly commented on just that. It was also made in great numbers. So what if we have the early MkIX, with the rounded tail and only the c wing type? It's a beautiful looking aircraft and many flew it to glory over better opposition. Let us do likewise chaps.