Sheesh, not again.
The Spit 14 K/D is low for two reasons that have nothing too do with its capabilities. One is the already discussed "accidental" launch for base defense factor. Two is what I'll call the

"spitdweeb" factor.
Bascially these are players who usually fly Spit V's and get just enough perks to finally try out a perk plane, and the first thing they do is jump into a Spit XIV (hey its a Spit so its gotta outturn everything, right?) and go out and try to fly it like a Spit V. So they go out, turn , turn , turn, and then promptly die. They just don't know how to fly the proper style to get the most out of the plane.
Put this plane into the hands of people that fly 109's, P-51's, Yak, and other similar types, and this plane is incredibly dangerous. So please don't try to convince us that it doesn't really deserve to be perked.
If you wanna fly a plane that out performs most others, then be ready to pay the piper. Both in perk points, and in perk tags. Get use to it, because I just don't think its gonna change.