I think it’s more to the point of why have the new water at all? The justification for change comes from that perspective, not the other way around. If it’s simply a matter of ‘so people have the option’…that sets a precedent for all kinds of toggles. It’s better and more consistent to simply stick with Vanilla means Vanilla. And the advantages the new effects give aren’t minor. From a questing perspective I’ll have to use the new effects to see what’s below. From a pvp perspective I’ll have to use the new effects to see who might be hiding beneath. Keep in mind shaman and warlocks can give anyone underwater breathing. I believe there’s elixirs as well.