[EDIT: Opinion alert!]
Disagree. Just because it doesn't turn like a spit5 it's not perkworthy? If it were named "numptydoodle.14" would it be any less powerful? About the only time I die in a spit14 is when I make a really stupid blunder. I use to fly it a lot. Several tours it was the only perk ride I flew (my reward, if you will).
It's a monster. Just because it doesn't turn like an early spit doesn't mean it's not one of the best (if not THE) climbers in the game, wicked fast, has 2 of the strongest 20mms in the game with the best trajectory, 2x 50cals with plenty of ammo to back them up, great visibility.
Except for roll, it's quite a bit like a -4 hog. Top tier, regardless of what the kills/deaths show.
Oh, and perhaps the lack of use on the Ta152 is more influence by the horribly buggly flight model, completely unstable flying characteristics, and not really being worth any perk price (self-limiting).
No, I don't think kills/deaths says much about a plane, because depending on how you look at them it could mean anything. 90% of newbies jump in an la-7, driving the deaths way up. Would you start thinking the La7 is any less potent if we got a sudden surge of 1000 newbies that droves the "deaths' Up without many additional "kills"? No, the performance stays the same.