Possibly yes, but then the ability wouldn't fit the theme of the frame as well.
Mirage's Sleight of Hand with the Explosive Legerdemain augment is a good example of an ability that utilizes loot as ammunition and still works effectively, so the precedent is there. And abilities having mandatory augments isn't exactly new, off the top of my head I can recall Nekro's Despoil and Ember's Exothermic but there's bound to be more.
And yes, Absorb could use some tweaks to just make it mobile by default, but it still works alright. What I'm trying to highlight here are her 1st and 2nd abilit