I have no problem with spit whatevers being add to the game - got nothing to do with the plane really, more ta do with who's flying it.
Unless you talking about 4000kg nik2 with 1800hp engine which dives faster than 9300kg P47 with a 2800hp engine?
Think the first thing that needs fixing in AH is some of the FM's really. Instead of adding even sillier ones
Just my personal opinion

Chow