I agree, and the only things I want for FFXV to make it feel complete to me, in my opinion, this year are these things, which I hope as many as these things that I listed are provided to us in the future, even if it's a few of them on the ones I listed.:
More lore on Solheim, and/or perhaps on the Line of Lucis or on the Crystal themselves, but I think I would want more lore on Solheim more, but either of the other two are fine, too.
Royal Pack DLC (Expanded Insomnia, new Chapter 14 Story Content, Mandatory Bosses, more involvement, in which Cor is being involved at some point. The ending is the way it is, but we could see the other characters seeing the dawn return.)
Episode Ardyn (Taking place during 2000 when he was a healer and his fall from grace, or his beginning as chancellor of Niflheim, or bringing about Niflheim's fall.
Revamped Leviathan Fight (Based on the Pocket Edition of the fight. This could help the second half of the game.)
Expanded Shiva Area (Based on the new Dungeon/Area in the Ghorovas Rift from the Pocket Edition for Chapter 12. This could help the second half of the game.)
Everything else would be extra for me. I know I said that the second half was lacking, but as long as there are some story updates in the second half, I'd be fine with it, and it'd be better for me story-wise, and that would be extra for me at this point, but we'll see what happens. I do have my expectations low, of course, as always.