I think it's already a substantial issue in JP; Japanese players do complain about housing availability (and also about prices, generating money on JP is difficult). I don't think it's a matter of only valuing JP voices so much as they think their marketing in EU and NA is lacking and they aren't predicting a boom in playerbase even with all evidence contrary.
The reason I say 'most of that housing will be on JP' is because a huge part of the Oceania community is based on the JP servers due to ping issues. The English speaking community in JP promotes Tonberry as their hub.