If NHRA tried things via the rules that didn't work, they didn't try hard enough. Change the rear gear limit, change the tire diameter, change the cubic inch limit, lets go to 70% nitro, change the blower overdrive. There are plenty of rules that could be changed if they were serious about the restrictions. Change the header angle away from what it is even further, mandate the rear spoiler height on the funny cars. In the long run any and all of these things would still be cheaper than having a grenade go off every 2 passes or having 15 of the 16 cars that actually show up to race go up in smoke and totally ruin an entire session of qualifying. If qualifying is "test mode" then lets drop a session and just go race the things.
I understand the thing having so much glue lets just about anything stick, but that horse got let out of the barn way back in 1975 when they experimented with it at OCIR and the national record stood for 8 years. I get it that you want to control speeds and it could in turn make for pedal fests, but it doesn't work in qualifying. In fact aren't they trying to do all they can to prevent oil downs and oil clean up time from wasting the day away? Taking traction away isn't helping.