Agree completely...
I've been playing with stuffing a trimmed mouthpiece down against the cup, and it seems to handle the leaking problem quite well. With the regular CE2's there's even room to stack another mouthpiece on top and have it remain flush with the top of the carto. I have to admit though that the taste of my juice isn't as good using this method. I don't know if it's because there's now a soft rubber mouthpiece too close to the coil, or because I've lost some airspace in the carto between the cup and the mouthpiece. My juice tastes warmer and less flavorful.
I've been playing with stuffing a trimmed mouthpiece down against the cup, and it seems to handle the leaking problem quite well. With the regular CE2's there's even room to stack another mouthpiece on top and have it remain flush with the top of the carto. I have to admit though that the taste of my juice isn't as good using this method. I don't know if it's because there's now a soft rubber mouthpiece too close to the coil, or because I've lost some airspace in the carto between the cup and the mouthpiece. My juice tastes warmer and less flavorful.
I don't think it is Really necessary to take the tube of to clean a Metal CE2. Or a Clear on for that matter.