Limit breaks should all do the same damage

[Sylve]

I'd be okay with that if only for not getting irritated at the bards hitting the LB right as soon as it pops up but before I can get back in range on a melee job from avoiding an AoE. I know you want to feel like you're dealing some damage, but wait the one extra second and let someone else use a real LB.

Except those lucky DF parties that do not have a melee DPS to use the "Real LB".

I support the OPs request.
In fact, set it up much like Ricochet works on a MCH;
Deals 100 potency to primary target, then 300 potency split between all nearby targets.
If only one target is within the radius of the effect, the full 400 potency is dealt to the one target.

Therefore, Ranged LBs are as strong as Melee LBs but ONLY when striking a single target.