Speaking as a person that doesn't fly the SpitV regularly because of its "problems", but every time I fly it I get like 5 kills in 5 minutes without even trying, I have the following to say:
I *could* live with the boost. The boost is only part of the problem (meaning the only issues related to the BS boost is that it accelerates way too fast).
What I cannot live with is the completely fictional climb rate, the completely fictional helicopter capabilities, whereby the aircraft (as modeled currently in AH) can nose up, HANG on its prop, and STAY on its prop in such a manner as allow steady aim at a higher spiraling aircraft down to speeds around 45mph. After said speed is reached, the nose drops (stall) but the plane instantly is back to 185mph within 1.5 seconds of gravity pulling it down. At which point it can literally zoom, from being totally stalled out, past the point it had stalled just 10 seconds before.
I have films of this BS "hover until 45 all the while keeping the gunsite perfectly on the enemy" crap. I was in a Ki84, spiraling upward and kept seeing this BS happen so I filmed it. Many pilots use/abuse this capability, and no plane in real life ever could perform such blatantly unrealistic manuvers.
THAT is what I cannot live with, in regards to the spitV. I can LIVE with a different boost. Sure. But this other BS has to go.
I just use the boost as a description of the problems. The spitfires need to be JUNKED as a whole and re-coded from scratch.