3D Touch support and Split screen multitasking
3 D Touch actions from the home screen for Inbox, New Message, Settings. Also peek and pop on messages. Split screen multitasking on iPad.
Drew shared this idea
I'd like to see this suggestion merged with https://protonmail.uservoice.com/forums/284483-feedback/suggestions/33865783-3d-touch-push-notifications-to-archive-delete-emai and https://protonmail.uservoice.com/forums/284483-feedback/suggestions/35809594-3d-touch-actions-on-iphones-from-the-home-screen-f