The new Aspire Atlantis clearo is a .5 ohm build that apparently vapes best at 30+watts, so I could certainly see the advantage of higher wattage.
It doesn't matter if you never use the full potential of the device, the higher your limits the more you can play around with different builds. Especially considering the P3 comes with hybrid threading, and that the dna40 board is built in the US (right?), also to exacting standards of safety, it really shouldn't be that big of a stretch to expect a ProVari that can pump out more than 20 watts and still do it safely. Surely the brilliant minds at ProVape are capable of it.
I'm not saying ProVape should jump on the 260+watt bandwagon, but at least with something like a 260 watt limit and the right batteries, I'd never have to worry about the resistance of my builds again. But 30 watts, 40 watts...if eVOLV can do it, I don't think it unreasonable to expect or believe that ProVape could safely do the same.