and along with this it'll have approximately 90% the max speed of the Ar 234 also at 27k feet... it may get a higher perk than the 234...
I doubt that it will be perked. For Christ's sake, the darn thing doesn't have any guns to defend itself with! Not to mention it's made of wood. Yes the B.XVI will be hard to intercept, and while it may carry 83% of a B17 bomb load, or have 90% of the Arado's speed, it simply isn't going to overbalance the gameplay. All the Mossie can hope for is that there is no co-alt, or higher, cons intercepting it. It would be a sitting duck if there were. I think some people are making the B.XVI to be something impossible to bring down, when it really would not be the case. There are several planes in the MA that will have no problem intercepting the B.XVI co-alt or lower.
Elusive? Yes. Unstoppable? Hell no.
While it will carry the cookie, about the only EFECTIVE use for the cookie would be to either drop it on a strat, or in the center cluster of town buildings. Using the cookie for a hangar would just be a waste of a bomb when it has the potential to do more damage on other targets.
If the B.XVI had a tail gunner, I would definitely support putting a perk on it. Otherwise give it a low ENY value like 5 or 10. If I am wrong about the B.XVI being overbalancing to the gameplay, then go for the perk price.