k4 and la7 perk would be nice 
Ehhhh, They are performance monsters, but they really can't even BnZ very well. Unreliable gunpackages (not so much the LA7) and mediocre diving characteristics make it so they have to commit to an opponent more than a P51 or a 190D/TA152 would have to.
Obviously there are guys who get good enough in those planes to be able to fight their way out of 3/4/5 v 1 situations, but I believe these guys are the exception, not the rule