Thank you for the quick response Sam, but my point was something else:

Normally (before the first blast glitch), blast shot would do 'single' damage on one target, when noone else is in the range.
But when fired into a group of enemies everyone who was in the range would amplify the damage. So on two persons, each would get hit twice by the blast damage, ect.
Strategically used it was devastating for any group of enemies and added diversity to combos and gameplay. I'm sure I am not the only bird who loved playing around with this mighty tool. Without, things are much tougher now, and I miss it as an strategic element.
Please look into it, it noticably weakened the efficiency and aoe possibilities of the bird class.

...or was this never intended?! D: