As Jeido has mentioned on the SK/Pally page, the Ancient: Call of Power song has lowered benefits due to the general haste available to melee classes. If it is true that people are capping out on their delay even without the bard's v3 haste, perhaps we can consider a way to make Call of Power be more useful for a melee based group in other ways.
The Song details:
Effect: Ancient Call of Power
1: Increase Spell Damage by 30%
2: Increase Haste v3 by 30%
3: Limit: Effect (Hitpoints allowed)
4: Limit: Max Level(70) (lose 5% per level over cap)
5: Limit: Spell Type (Detrimental only)
6: Limit: Target (AE PC v1 excluded)
7: Limit: Target (PB AE excluded)
8: Limit: Target (Targeted AE excluded)
9: Limit: Target (Uber Giants excluded)
10: Limit: Target (Uber Dragons excluded)
11: Limit: Combat Skills Not Allowed
What can we do about it?
option 1:
Remove slot 11, add: Increase All Skills Damage Modifier by 10%
This makes classes such as berserker, rogue, and monks gain benefit.
option 2:
Increase Damage by X value.
This is a custom concept, but having a new coded check in the damage calculations area of the code where if this buff is on you literally do more raw damage. Since this is a raw value, it may also be possible to create a formula to help keep singing modifications at play, so puretone can have an added effect.
option 3:
Increase attack by X value.
Pretty self explanatory. Though, attack I feel is more reserved for percussion based songs I would think.