I'm sure I'd like a smaller capacity tank, too, and it would be interesting to see if it improved the flavor. It would have to be a huge flavor improvement, however, for it to be worthwhile to me. As it is now, the flavor is very good, and the 4 ml liquid capacity allows me to take my Sirens out and about without having to bring along extra liquid for refills. Maybe instead of the new version only having a smaller tank, it would be best to have two tank sizes to choose from? The Siren is a thirsty tank, after all.