EoG is a massive, four stage title that will serve for many as the foundation of their wealth stack after trying all of the one stage wealth titles. As such, making it first would mean missing out on all the latest technologies and the such and require more upgrades – which means changing the “feel” of a title after people have become used to it. Not a wise product experience.
Thus, anything that could go into EoG would be updated first – which is pretty much everything.