I think as far as the twin cylinder classics are concerned, I would agree with you.
However, the V4 shares no heritage whatsoever with past Norton models.
Its totally modern, "hair on fire" design says, I'm not your grandfather's Norton.
Making the streetfighter just requires a V4 - which already exists then:
1. Remap the EFI system for better low end torque
2. Instead of a fairing, bolt-on some angular plastic or carbon bits for the spaceship look - young folks like this
3. Replace clip-ons with low bars
4. Some very bright/gaudy paint - again for the young
5. Christen it with another name like V4 Naked, instead of the pretentious streetfighter.
I would be tempted..... but at what price could they profitably sell it ??