I find that your new interface for selecting lists for emails is very counter-intuitive. When my account first switched over the tutorial did not automatically pop-up. I had no idea that I could type in the box to get a list or that clicking the "+" icon would drop down my lists. Initially it just seems like that box is only for typing in a new email to add to a list by clicking the "+" button (because the box does say "add to email list"). Since I saw no lists I thought there was a problem and that they were gone. Additionally, it causes the user to mouse back and forth several times across the screen. I have to click the "+" on the right, select my list on the left (our company has so many lists that I cannot remember what they are all called, so I need to see the full list), then click apply on the right, then click save on the left. You should really have considered that in your new design.