Well, first, I would like to say that calling my posts half-assed isn't nice.
And second, what the hell does the LA7 have to do with anything? It's modeled for how it flew. The fact that everyone flies it like they want goes hand-in-hand with what I said earlier "Make the plane. Model it properly, then let the people fly it however the hell they want".
You might be right. The spit14 might be a throwback from Warbirds. Maybe they just had a certain base of information and built from there.
However AH is not in competition with warbirds. Warbirds is quite dead.
To answer the question: No. I don't think we need anything between the 9 and the 14/16/whatever the perked ride will end up being. The real 9 was more than a match for most planes modeled in AH. Considering the fact that the major differences between 9 and 14/16/whatever are the speed, the climb, and the high alt performance (not considering LF), why make several differences with only minor speed changes? If you do that then every 190 from the A-0 to the A-9 is needed. They all had slight speed changes throughout their development, so they all must be unique, right?
All sarcasm aside, there's a point when a spit is a spit is a spit. There are marginal differences (not considering LF) between the mid war variants. And marginal differences between the late war variants. Timespan of 2 years or no, you only need 1 bird to represent it, in my opinion. I just wish that bird DID represent, but that's another issue.
I can see adding a spitV (I like that SpitVB idea!), a spit9 with 303s, and a spit LFIXe with 50cals. Because then that LF would fly like a totally different plane. Worth modeling.
But adding a 5, 8, 9, 12, 13, 14, 15, 16, ... is not needed. In fact it would just "clog" the game, so to speak.