Well these are coastal villages mainly so they are gonna at most be walled from the landward directions. Which is irrelevant since we would be coming from the sea. I figure 2 Centralization is a good amount to gain from Enforce Justice after we absorb these villages. Their size (near a province really from what I can see) means we are gonna be dropping Cent by 1 or 2 most likely. In the case it is only 1 Cent we lose, we can push to 5 Cent with an EJ, if it's 2 we go back to four. Either way we have means and space to make more New Trails. Probably to Blackriver and the West Wall.
Most likely, these provinces are neighboring our southshore villages, so we could just be expanding an existing province.