Add option to have subject / description for mail defaulted open.
Being required to press the tiny + button when mailing is a huge pain for guild functions. I would love an option to toggle the Add Subject / Description permanent. Rather than a small pop up box over the Drag Item(s) Into Box. Make it increase the height of the mailing UI and put the Subject and Body sections between the Recipient and Items boxes similar to the Blizzard UI. This extra step really slows down my mailing guildies items they win from our guild raffles.