I was kinda disappointed that Square Enix didn't show some deaf-friendly features.
http://forum.square-enix.com/ffxiv/t...sts-and-Combat
In the final boss battle, I was surprised that a leader can pop some number icons on top of monsters for his/her party members to see what to kill next. Even, sub-mobs respawn around the boss, a leader can modify all icons like "change the number 1 icon on top of the boss to cancel" without telling party members what to do. It seems we can fight everything even without a keyboard or headset.
If you have played Portal 2 online then you would know what I mean though.