Basically a slower meter 4 spec ball for circa 500 credits turned less money for zero speed throttling.........................I am sure it would sell. The real problem is is that every slow meter cheater aid would also be selling like hot cakes, which is bad any which way.
I would also say that if one shot here and there is not critical less expensive balls can still bang is 30s or below often enough, and without any real mapping. Go map a say L33 Cally and RG level is achieved by very credible players.
Nice to have fizz - many agree, but I can't see it happening.
The price of the top spec balls is looking wishful, but that's another discussion........