I've been led to believe that Surefire could have designed a reflector that eliminated the Lux V donut, but at the expense of maximum throw. The original design assumed people desired throw over beam perfection. Apparently, that is a flawed assumption.
If it is true they've redesigned the reflector (or most likely, they just shimmed the emitter higher / lower to move it out of the focal point) to "eliminate" the donut, you should see a somewhat larger hotspot and somewhat less throw. This wouldn't bother me in the slightest, but others may not care for this compromise.
On a related note, I recently returned a U2 under RMA for the same exact reason (bad donut). The replacement I received has substantially less donut, but it is not 100% eliminated. If they are truly shipping U2 lights with a different reflector or a shifted focal point, I do not think the light they shipped to me has it.