Multiple behaviour tweaks
Instead of tapping the bottom right keyboard button, the keyboard should be brought out by tapping anywhere within the terminal.
Add an option to keep the notification bar visible.
The navigation and shortcut/tool bar should both be visible at all times.
1. I disagree slightly, it should be the user's choice via settings thou.
3. The same: Add an settings option for that behaviour.
Also, add an option to remove the gesture button in the bottom left. That way all 8 shortcuts are easily accessible without needing to swipe. I never use the gestures anyway.