I'd much rather see people in 109Ks than 190Ds. Would make for much better fighting atmosphere.
The spit14 should be flown similar to a P51. Most people just get too aggressive with spits. It's hard not to be. One thing I dislike about the spit14 is that the wings blow off very easily.
The spit16 in my experience is much easier to maneuver in than a 109K. The spit16 is one of only planes that can do a triple Emmilman. I think it has better zoom climb than a K4. Anyone who knows what they are doing will beat 109s pretty quickly in a spit16. The 109s also have a harder view out of the cockpit and aren't as responsive as a spit.
If you look at the overall K/D if the 190D compared to spit16, La7s, and 109s, it's higher because the 190D doesn't get into tangos as much as these planes. It has to be flown more timidly, and therefore creates the perception that there is a lack of fights.
I actually still do prefer the P51D over the 190D. I like to fly more aggressively and force overshoots. With a 190D or temp, you can't easily win 1v1s against better turning planes after a few turns. Running away is the only escape, and thats boring, for me.