Yup it is a bit of a kick in the teeth.
You read the whole list and realise that all of that should be added. Then you remember they're making us choose, meaning not all of this is going to happen.
SE already said a few of things were happening (namely Ardyn DLC and Araena/Cor/Iris) so my take is that this is a list of content compiled from the last survey and all currently scheduled to be put into the game. The items are too specific to be some random ideas.
I really believe that the purpose of this survey is see which are the lowest scored ones (probably playable Gentiana and the Line of Lucis / armigar buffs) so they will be given minimal priority for implementation instead of whatever are the most popular choices.
For those of you being hopeful for that list, going to put something into context. I guarantee you those are stuff that they actually have readily available that simply was cut because it wasn't polished in time for November launch last year. Those look like it was stuff that was cherry picked to be cut and is now being added as part of the "feedback process" in order to make it seem like we're getting a deal. I can't believe some of you guys are eating this up.
Want an example of what I'm talking about? How about 13-2. They didn't magically bring back voice actors to have that cutscene done. It was still pre-recorded and a cutscene most likely already done and gameplay already done that they gutted because it couldn't meet deadline or they held it back for the timing of the DLC release. Either of which are inexcusable.
a. These are free updates. They don't have to do anything but release the 4 DLCs.
b. Things get cut all the time in development. Not surprising. There's no conspiracy.
c. What are you talking about with 13-2? The Goddess DLC? IIRC the reason that took a bit to release is because they designed a whole new gameplay mechanic around it. They also had to create new cutscenes and recordings for all the coliseum battles too.