Only recently I've had the pleasure of playing with my home built dual throttle. I've done the manuver you describe, and it isn't gamey at all as it was done historically. Now, granted a real pilot may be disoriented from such a move but it was performed.
Here is a quote Guppy/Corky was nice enough to post for me in a private forum.
I came across this comment in the back of "Twelve to One" It's by Elliot Summers who was an ace and Squadron CO of the 432nd FS, 475th FG
"If caught by the enemy and you have plenty of altitude, the trick of chopping one throttle and applying aileron and rudder will lose him."
At the top of a climb, I use opposing aileron, I cut one throttle briefly and then cut both. I tap the opposing throttle to recover and in doing so it performs a perfect hammerhead. I never cut one throttle and spiral down, and lose precious alt and speed.
The only time I cut one throttle and perform an out of plane manuver is when I see something behind me and is so close that I cannot evade. I can count on one hand how many times I've done it, and I've had this dual throttle for over a month now.