Our Ta-152H isn't exactly modeled to the highest level of accuracy (it only gets about 453mp/h when in reality it got 472mp/h). However, that doesn't mean it's a poor fighter.
While it sheds a lot of energy in turns, it retains it like no other plane in the set when you dive and climb. Many times, I've dived from at least 20,000 feet down to the deck and maintained a speed of over 500mp/h for quite a long time (I never counted, but I'm guessing it was at least thirty seconds).
And, when you've got the energy left from a dive, it's not at all impossible (or unlikely) that you'll be able to zoom climb right back up to where you were before the dive, if not higher. I've surprised many Lavochkins by doing just this, and it's gotten me out of harm's way enough times to make me really like this aircraft.
Along with its excellent energy retention and zoom characteristics, it has one of the most powerful guns packages in the entire set. And, since they're all in the cowling, it doesn't take expert convergence settings to make them work with a high rate of efficiency.
So, in short, you're dead wrong about the Ta-152H-1. It's black death when flown properly (this would be climbing to at least 20,000 feet and diving to zoom and cherrypick, as well as the rare high-altitude fight). It can scare the living crap out of anyone, mark my words.