Ah, that would be why they mysteriously disappeared. So nice of them to make that clear...
Ah, putting the ability behind an upgrade does make sense, but if they actually told me that anywhere I missed it.
It seems like early game now almost requires pretty heavy investment in troops to contend with barbarians. Maybe that was the case in the harder difficulties of 5 too, but I was used to having a bit of time to upgrade before having to deal with them. So far the distance between empires seems to be a lot more too, which seems nice.
Early resource tiles also seem to be less important than before, but still too early to know how that really plays out. Getting a mine or farm out early didn't seem to be much of a boost.