My FC's dragoon has 8 atma. Since the last time he updated us, three days ago when he had one atma (which took somewhere between one and two hours, because he got frustrated that they weren't dropping for him, even though they WERE and he missed the notification so some of us ended up with up to FOUR), he's had a total of maybe ten hours where we didn't know exactly where he was and what he was doing.

The drop rate is fine. If you don't like it, just don't get atma. Nobody's forcing you. Go get a leviathan or soldiery weapon. For most classes they're better anyway.