Ah, Ithorians... I find it interesting that a pacifist race has such a deadly natural weapon.
Anywho, I do agree that something like bellow would definitely be under resilience, and really enhances the need for the skill. We need to tell FFG before it gets put into the final issue of the game! I won't have a book that has proposterous information on one of the most respectable races in the galaxy, I just won't!
I don't know why Ranged (Light) would even relate to something that is entirely physical. Not to mention that it kind of just spews all over the place (or if you focus enough goes in one general direction). Ranged skills are kind of based off of your accuracy with the weapon. Heck, god forbid, you could even put it under Brawl (forbidden due to peaceful nature, and causing great conflict in the species).
But still, Resilience is better than Ranged (Light). And like I said, we should post this up.
I can definitely see your reasoning, if they went this direction I don't think I would have a problem. I'll play devil's advocate on this one and mention that Ranged (Light) is listed as combat skill while Resilience is not. This opens the door for talents and abilities that explicitly mitigate or affect combat abilities to affect the Bellow attack, however there would be quite a bit of confusion on whether Bellow would be considered a combat skill.
Just a thought.