I concur Dirt. It will definitely be a contender in the LW main as far as performance goes.
No more so than the Yak-9, and they aren't too common. IMO, its mostly because the Yak doesn't offer extermes of preformance in any one area.
It can do a bit of everything with reasonable preformance, but that leaves it vulnerable to any plane on the extreme end of the spectrum.
109K and 190D will BnZ/slash attack this thing to death, or will try to entice him into a looping match, which they know they have an edge in.
Spits and Niki's will out turn it, and tear it to shreads.
P-47's and P-51's will dive on it from 10k.
IMO, its vulnerable to extremes in preformance, which is why it is relativly rare. The same can be said of the C205, the La-5, etc. Both are deadly aircraft when they get even 1/2 a chance, but they don't usually see that chance against an equal opponent in a high preformance aircraft.