Oooo, this is a really REALLY good question! I'm just going to have to respond with my own assumptions here, as I'm not terribly clear on how aether affects the body and none of my characters are terribly in touch with its manipulation.
That said...I'd assume that since Gloom causes aether to be in such abundance that it's actually a bunch of visible wisps in the air that there'd be some sort of effect to those who are more sensitive. It'd likely feel an awful lot like being surrounded by static electricity, if I had to guess.
Bahamut's calamity didn't appear to have that great of an effect on the flow of aether in Hydaelyn at all, since the aetherial powers and systems that were in place before are still operating now. Bahamut only attacked the physical plane to an incredible degree--he didn't breathe fire so hard that the lifestream was also wounded, even though the planet had been scarred.
My 2 gil...and I'm certain someone more learned on the matter will respond and correct me where needed.
That said...I'd assume that since Gloom causes aether to be in such abundance that it's actually a bunch of visible wisps in the air that there'd be some sort of effect to those who are more sensitive. It'd likely feel an awful lot like being surrounded by static electricity, if I had to guess.
Bahamut's calamity didn't appear to have that great of an effect on the flow of aether in Hydaelyn at all, since the aetherial powers and systems that were in place before are still operating now. Bahamut only attacked the physical plane to an incredible degree--he didn't breathe fire so hard that the lifestream was also wounded, even though the planet had been scarred.
My 2 gil...and I'm certain someone more learned on the matter will respond and correct me where needed.