Deals often are on and then off or otherwise not necessarily expected to happen. In the midst of that, services typically and properly tend to push forward with what they were already doing as though no deal is going to happen. The worst thing you can do, is halt your progress during a negotiation.
Halting progress indeed seems like the commonsensical thing to do. A massive UI overhaul is not be the most resource-efficient course of action if you plan on announcing your demise. Hence my startling