I don't know about Wakfu, but development of Final Fantasy XIV: A Realm Reborn, even localization, is all done in their Tokyo offices. I don't know what anyone at the L.A. satellite office would be doing working on ARR, so I don't know how layoffs there would affect that project expect perhaps by reallocation of resources (which does not seem to be the case).
What did Square Enix's L.A. offices even do? Were they anything other than a State-side localization (and maybe marketing) team?