FFXI's first expansion pack, Rise of the Zilart, released a year later
  • New story arc.
  • Raised the Level Cap from 50 to 75
  • 4 New jobs: Ninja, Samurai, Dragoon and Summoner
  • Added 15+ new zones.

FFXIV maybe under different management but I suspect they will operate within a similar manner. Version 2.2 and 2.3 will probably just build on what's already released in 2.1 (more items, primals and coils/CT) while they focus all their content creation on the expansion pack.