Slay probably isn't the right term. They want to improve upon the concept of email. If you're solely using email to manage projects and groups you're taking what is admittedly an elegant and simple platform and trying to stretch it too far.
I don't mean to say that email as it is will get us to a very elegant solution for something like group project management. What I'd like to see is that if email + some addons/enhancement can get us to solving 80% of the project management problem.