I didn't make my point clear in that in Oz we have to undo the pouch & put the life jacket over our head. The idea is that once in the water it would be very hard to do that, especially for the pilot who would be pi**ing himself & would have both hands full! If the passengers are wearing a pouch jacket, the chances are they have never taken one out & certainly not in a HUET. I've seen aircrew try that in a HUET & most found it difficult under water, hence CASA requires the jacket on. Even a lot of offshore companies won't accept pouch jackets.
My other point is no floats which means a successful ditching would be that much harder, particularly for first time tourists. There's no beach to swim to either.
Just a safety concern for discussion.