WhatsApp has become a social staple in many countries around the world. Where I live, it's either use WhatsApp or be a social reject... so everyone uses it. However, by relying on the app for all of your messaging and communication needs, you have to accept that its new Android-specific features will come at the developers' whim. Thankfully, they didn't take long to update the app for Android Wear.
Version 2.11.318 of WhatsApp has been made available for download on the official website.