While I'm not a fan of the proc system, that idea doesn't work because removing procs removes all limitations on what job you enter as and how many you can claim at once, so strategies like mass Fell Cleaving and parties monopolizing several groups of monsters at once would not be an uncommon tactic. And if you want to argue that every camp would be open, I think that's precisely what they want to avoid to "control" the amount of ancient currency being brought in. They would reduce the bill drop rate dramatically.