Ok, so, FF XIV has a very specific “approach” to expansions. Here is the general plan:
- Expansion (or base game) comes out, has an ending.
- Each expansion has then 3 major updates that actually “end” the ending, closing lingering plot threads, exploring the consequences of what happened, etc.
- Then after that come 3 major updates preparing the terrain for the next expansion - introducing new conflicts, characters, etc.
- New expansion is released.
So yeah, there is a lot added between expansions; tipically, half of it is about really finishing the previous one, and half of it is about getting things prepared for the next expansion. And that applies to ARR as well - so you have basically six major updates of content (including not only story but several dungeons and raids) before you get to Heavensward, and it’s actually really good content.
Now, post-Endwalker was a bit different, but we can talk about that when you get there. ;)