Yes. It is almost like the Civs on distant land do not participate in the game at all in the first age, but are only really joining the game in the second age with an advanced start instantly granting them some settlements.
That was why I was wondering about this new ability. Will you be able to explore the coastlines of otherwise empty distant lands, which will then be instantly populated in the next age?
This may feel a bit weird, if Tonga had Explorers that were able to discover distant lands much earlier but somehow overlooked that there were other people living there, beyond the independent powers.
That was why I was wondering if they may be have changed how and when the Civs in distant lands actually join the game with this patch as well.