First of all, brilliant addon! Can't imagine going without it now that I started using it.
But going through the spell lists on Ability Watch I saw a couple of things that could do with changing.
-Warrior: Add Disarm as an ability. Remove Pummel from the buff section.
-Priest: Add Renew as an ability.
-Paladin: Add Blessing of Sacrifice as an ability.
-Warlock: Move Fear and Howl of Terror from buff to debuff. (I may be wrong with the assumption of how this works as I do not use it to track these particular spells, but I did think it a bit odd seeing them there given that Death Coil is listed as a debuff.)