When we talk numbers weren't only like 13 Ta-152s in service/combat by the end of the war? If so, that would mean the He-162 would make the cut. As for how many perks, the next question is whether or not the perks should reflect the threat posed by the bird, or possibly a new model that would reflect how often one would see the He-162 in real life, which was almost never. If so, it would be perked much higher than the Me-262.
In any case, I would love to this see bird in game. For me the bigger question: If AH has maybe $20,000 in salaries to burn coding and testing to create this cartoon bird should they instead spend that $20,000 on advertising AH? I would MUCH, MUCH rather see our numbers double than another bird in the hangar.
Just my two cents.
boo