Past participants

WhatsApp is working on a feature called 'Past Participants' that will allow members of a group to check who left the chat in the past 60 days.
It is currently available on iOS beta.

View expired disappearing texts

Users will soon be able to keep disappearing messages even after their expiration.These messages will be stored in a new section of
the chat info called 'Kept messages.'

Filter for
unread chats

WhatsApp will soon allow users to filter their chats by displaying new messages. The unread chat filter will permit people to view the list of all their unread chats.

React to
status updates

WhatsApp will soon permit users to react to
status updates with eight emojis. Once the
reaction is sent, the emoji will be seen as a
status reply within the chat.