I know if i press the menu button on my samsung galaxy s3, i will get the "Delete Now" option, but it would be nice to have it at the bottom icons bar, as it's used a lot. and having to click menu > delete is kind of a pain when you have a 100 emails and u need to go thru them quickly.
i'm used to using this feature also in k9, when i delete the email, but a quick tap at the bottom, then it automatically goes to the next email (i saw this feature in aquamail too), and so on.