Will it be ready for Essen?
Yes, it will be ready for Essen, and I think the new website includes an Essen pickup option. Pax Emancipation is currently at the printers (Panda Games) and will be delivered from China at the same time as Neanderthal 2 and Greenland 3.
I will ask my new boss Besime about when pre-orders close. Deliveries of orders (both website and kickstarter pledges) are scheduled to start in September, possibly as early as August. So I would imagine pre-orders would end in early August.