Alongside 'Swipe to Reply' gesture to its s on Android devices. Now, the Facebook-owned company is reportedly planning to introduce a Vacation Mode, as well as a "Linked s" feature. Additionally, WhatsApp seems to have changed how notifications are handled for muted chats.
WhatsApp beta tracker WABetaInfo is Android smartphone. Previously, notifications from muted chats also counted towards the count of unread messages. It is said that the new feature is already enabled by default. However, it isn't available in the form of an option in the Settings menu so there's no way to disable the feature manually if you want to go back to the old behaviour.
Additionally, WABetaInfo reveals that a "Vacation Mode" is in the pipeline that has apparently been in works for some months. The feature is said make archived chats that have been muted to remain archived when a new message arrives in those chats. At present, WhatsApp automatically unarchives an archived chat once a new message is received in that chat. This behaviour will apparently be controllable via the Notifications settings on Windows Phone. WABetaInfo has evidenced the feature by showing a screenshot that appears to be taken on a build of WhatsApp for iPhone.

Photo Credit: WABetaInfo
WhatsApp is also reportedly working on a Linked s feature that will let s link their with external services. While the option appears to be mainly focussed for Instagram as an external service.
You will need to insert your credentials once by tapping the Instagram listing from the Linked s option. This will link your WhatsApp to your Instagram profile.

Photo Credit: WABetaInfo
It's possible the Linked s feature will mainly help WhatsApp s recover the of other Facebook services. Furthermore, it could help the s share their WhatsApp statuses on Instagram. The latter use case might be helpful for enterprises using the WhatsApp Business app.