...we tried Robin Hood already. It was shown to have little to no effect. ATSSB already has a band track exclusive to 4A. The Grades 1 & 2 lists on the PML have had rather large numbers of new titles placed there in at least the past 5 years annually.

Sounds like you are stuck in "broken record" mode, where you have the same complaints from 20 years ago. They've been addressed, but people still gripe.