Kamara tweets a yawn emoji……….... is it in response to news of Moore being the likely next Saints coach?

Absolutely could be the case. But to think he didn't have some intent behind the timing of his tweet is being purposely obtuse. Even if it ends up him just trying to rile up fans for his own giggles.
Players do as much harm as good on social media, if I ran an organization, they wouldn't be on it.