How about create music divisions?
1st, 2nd, 3rd
Point is - really good, commercial material gets in first division. In second - less commercial, maybe more creative stuff, with good quality.
3rd - you get a bitchslap ) not really great stuff, but probability useful in some cases (with reduced price).
If you get in 3rd division - your material is pretty poor. If your new tracks always get there - this will be wakeup call for you, to make improvements.
If your stuff always goes in 3rd - this should be visible at your portfolio.
Yes, i know, this may looks a bit like nazzi approach.
In this case it is possible to put 3rd division somewhere away, from first two. It will be visible in search engine, but have smaller priority.
So, where reviewer have doubts about some material, he can just put it in 3d division (with one click).
Author should be disappointed, but it must push him to work harder. To get in better division!
Aaaaaand, probibilly, if 3rd division placed in separated category - there can be more approved material. Those material, that is on the edge of usability (or very copypasted with not great quality).