I know that everyone wishes that *all* ability augments could be turned into exilus slot mods.. but DE's stance has been that "Exilus is meant for movement and mild QoL changes, no DPS." This applies to both frames and weapons. There's a few mods that have a tiny bit of power creep but those are a small class of mods, limited to 15% and are generally tied to some sort of movement. While good for hitting some thresholds, they don't break the power structure in any way.
Valky'rs Swing Line (which lets you recast zip line in midair 4 times) is ONLY a movement ability, and it even has a cond