Posted in beta forums. Reposting here for users enjoyment.

FFXIV is playable on NVIDIA SHIELD!!

Step 1) Set up FFXIV to play borderless windowed
Step 2) Add FFXIV to Steam
Step 3) Configure FFXIV for a XINPUT controller. This is NECESSARY!!!! The SHIELD acts as XINPUT Controller 1 when attached
Step 4) Launch Steam from NVIDIA SHIELD. Log in using keyboard on PC or virtual keyboard on SHIELD.
Step 5) Enjoy