It goes nowhere, because the Powers That Be don't see the problem. Never mind that more bands play Grade 1 and Grade 2 than literally any other list. Every 5A and down NV, every CCC NV and CC all the way down can play off that list - and CCC NV can play on the Grade 2 side of things.
More bands need this music than any other category. And it has the fewest number of pieces, and usually the fewest number of added pieces on an annual basis.
That's 100% why Adrenaline Engines and Fireball! get overplayed. It's because there are so few teachable pieces for young kids that don't require the band to sound like 100% of them take private instruction. It really seems sometimes like most of the Grade 2 list is ballads!