A spec tire is great in theory... but only if they control how many are sold too. The people willing to run a new set of spec tires every week will still force the majority to spend $ on tires to keep up.
Its the same thing with a blinky class. They did it to blackball boosted and level the playing field... but now the discussion is "whats the fastest motor and speedo combo" to run with a specific gear. So now people are buying multiple motors and speedos looking for the edge in speed... when all they had to do was run a boosted setup... or mod.
Its brushed stock class racing all over again. Battery motor and speedo wars...