In the new Android app (which is great, btw), when I click "Reply All" to an email, by default it only shows the "To" field. "Cc" and "Bcc" are hidden by default, which is fine...unless there are recipients hidden on the Cc line. Right now if you Reply All to an email there is no indication at all on the draft screen that others are on copy unless you click the little arrow to expand the Cc options. This can (and has already, for me) create situations where you might send an email without noticing there are additional people on the recipient list...potentially very awkward/dangerous.

Would be much better if the Android app does what the web app does and shows a "Cc" section on the recipient line - you can't see much unless you expand it, but at least there is a visual queue that there are other people who will receive this email unless you remove them.