I said Kostya in your last release post; this new design beats all....and I see there is some requests about changes, as for example being able to change the colors of the heading/bottom, which wouldn't be a bad idea (or maybe easier to make a couple of more "color-themes" to choose from)...
BUT...I have an idea which I really hope you don't get offended by;
The new look also has a new and absolutly nicer (and updated) icon...why don't you change this to be the new Aqua Mail icon?
It is nice the one you have but the new one in the blue design is absolutely nicer and more "material" and modern.
Look at the attached pic;
Compare the two of them like that...there is no doubt if you ask me