I have tested hundreds of different systems using chromes Race Census program and i can tell you one thing that makes a difference every time that can turn a loser in to a winner.

Price

Give me any single raw filter that you think is a winner and i will test it with 2 price bands, under $3.50 and over $3.50

If you think that the over $3.50 is to general we can put in a max price and i will beat you every time with the under $3.50