I mean this sums it up.
It is the most profitable title Square Enix has ever had, and they want to 'spare no expense' on keeping players happy.
Which means spending the money on an extra development team for 7.0 to bring about a faster release pace for content.
If they cannot keep to their own word, and are not willing to spend the extra money to produce long lasting content that will keep people happy during the downtime between major patches, then they shouldn't be making statements like this.
Looking at the JP forums and many other fan based forums for XIV, the same issue rings out loudly, People want more.