First: Please increase the width of the text field for the Subject! It's really small =(
Second: If there's a way to enable "Basic Mode" of the Text Editor by default, please provide us with it. The current popup implementation is very uncomfortable.
Third: Bold text is unnoticeable. If you might alter the CSS for it, I would be very grateful.
Also, if there's a way to switch to Office like commands (like using Ctrl+B to enable/highlight Bold), please also enable it.