Bard Feat Mods for Warlocks

[DestroyerOTN]

Given, as I assume, the bardic song feat is used to apply the varying warlock changes; why not add the ability to (rather than remove) simply implement new utilities via the others?

Curse Song: Modifies the -Warlock menu, allowing one to select a burst attack function. This arcs the projectile, as was once, over an IG radius equal to that of the aforementioned curse song, but cuts damage to 1d4 per three levels from first.

Lingering Song: Causes the warlock's blast to roll three checks against resistance, and two for saves. One on both for spell, one for blast, and one with a coupled save equitable to the spell for application of a fixed 1d8 DoT (like acid arrow) effect.

Lasting Inspiration: As a bardic capstone, it should come to be a warlock capstone, based entirely upon pact. If fiendish, it could increase the power of the summons. For feylock, it might be utilized to bump the roll, for every level after 20th, to a 1d6 add-on to damage; or bolster the DCs of any warlock spells.