This is correct. Users who purchased FINAL FANTASY XIV: A Realm Reborn on Steam will need to purchase FINAL FANTASY XIV: Heavensward on Steam as well.
This is also correct.What this means that a physical CE copy, digital copy or a physical copy would not work, since it is not the steam version.
Yes, we are currently working with Valve to launch pre-orders for the Steam version of Heavensward (standard and digital Collector's Edition) that would include the pre-order bonuses.While I'm waiting for more information from steam regarding their pre-orders, do we still have the option to get the collector's edition bonuses, or even the early-access codes if it is purchased through steam? I'm coming up with nothing from both the steam community or here.