WowAce

What is the enhancement in mind? How should it look and feel?

The enhancement would be to allow aura filtering by using the spell id, similar to the name option.  By filtering for "Death and Decay", I get both the Lady Deathwhisper spell and the DK spell when I only want the Lady Deathwhisper spell.  I am trying to emulate the Grid mod, GridStatusRaidDebuffs.  In the alternative, the ability to have debuffs shown only in certain zones would solve this problem.  I could filter for Death and Decay, and only have my debuffs on my raid frames shown in Naxxaramas, Icecrown Citadel, et al.

Please provide any additional information below.

I can already foresee a problem with 10 man and 25 man raids having different spell ids.

You can already filter by spell id. Take a look at the alpha. This feature is in.