Although the "outside the States" is very clear, the several other reps I additionally chatted with are stating that that limit SHOULD apply to newly opened accounts only.
They also commented that the Delta card should finally become available once again in July 2015, but ONLY for the Advantage ($25k min bal to avoid $25 monthly fee) account, which remains 1 mile per $ but is limited to only 4k (vs 2k for existing balanced accounts) per 5th through 4th of month periods (not rolling 30 day).