TBH the product team in whatsapp needs to find some way to be meaningful. What could justify being a head of product or product manager in a chat app? New emojis? Gif support? New backgrounds? No, let's just make whatsapp like instagram. She's going to get a promotion now or move on to some new business as chief product officer.
No offence to the product team, i know that this is how it works in tech. It's the same for engineering and design teams in every single b2b/b2c business. There is no concept of feature completeness anymore, every single service has to copy from others or be something instead of 10 other services.