It does, in fact it says quite a bit about its capabilities but you're so intent on trying to show how irrelevant the D.520 is that you're blind to it.
I think other things should come first. Oh dear Jesus, I must be biased when viewing the data

!
Say you're in a P-40E. You shoot me down when I'm flying a Ki-84. That doesn't say the P-40E is better than the Ki-84. All it says is that I've been out of the game for over a year, and couldn't have beaten you even when I left. Going "but the D.520 has a high KTD, so it
must be good!" is entirely incorrect. It
might mean that, sure, but its not in any way a guaranteed thing. Like I said, the D.520 was given to better units first, and so it's KTD would be influenced by pilot skill more than if it had been the primary fighter for the French.
I'm not saying the D.520 is a poor fighter, and I'm not saying its a good one; I personally don't know. What I
am saying is that its KTD can't be looked at as the difinitive indicator of its capability, due to the limited useage, and uneven distribution between units.
If you feel I'm wrong, by all means correct me. But please don't pull that "You're wrong, you just don't know how you're wrong" BS.