there is no rule change to make "immediate" gains in the NOS camp. They are a tenth behind right now. Most can't meet min weight as it is. Unlimited cubes is an option, but a undeveloped, expensive, unproven option.
As for slowing the blower cars down, the kneejerk is always overdrive reduction, but is usually overcome fairly quickly. Other options are elimination of the 2-step, injector hat area reduction, gear ratio changes, among others.
Having said all that, I think it may be too late for alot of NOS guys...