From my view of this discussion, Greg is making excellent points from the POV of a Vee driver. I think FF and FC drivers (when they haven’t driven a FV) lump themselves in with the Vee guys as “the slower OW classes”, which if you go merely by lap time they are. But driving a Vee isn’t like driving a FF or an FC. Those classes are low powered, Vee’s by comparison are no-powered. A well driven/well setup Vee is incredibly capable thru the middle of a corner. Unless you’ve driven one you really can’t believe it, because they are so slow on the straights and whatever their min speed for the corner is what they have for about 50/60 yards down the road. FF’s and FC’s are shifter karts by comparison to a Vee. I would personally rather race a FF in the FA group than have an FC in the FV group. And I say that as someone who has driven all of the open wheel classes.
In San Francisco Region, when FC class was moved to the small OW group for regionals (around 2008/9) it killed FV. Killed it. What was a thriving class with a furiously competitive regional group of 15-20 regular competitors, has since then struggled to get more than 3 cars at a regional. FC by comparison has thrived locally in the past 10-12 years.