In regards to summoning your Choco companion in dungeons... don't be so quick to rule it out without proof.
http://www.dualshockers.com/2016/04/...tent-revealed/
One particular line - "The code for the chocobo buddy is very complex and it’s taking a lot of time to allow players to summon chocobos in dungeons and while in the duty finder. Yet, the team is trying."
There is still hope for those of us that so desperately want this ^_^