I don't see my total number of contacts every now and then...? Can you add the feature of "who joined WhatsApp" or "new contacts on WhatsApp" from people in your contact list? For example I am in your contacts list but don't have WhatsApp but joined. Or when I delete WhatsApp for awhile and join again ... It's handy especially when you have 300+ contacts. Because this number drops and then you don't know who deleted WhatsApp.