As you all know, with the inclusion of account wide mounts, you only need to learn one mount once, on any of your characters, and all of them share it.
This is great, especially with people with MANY 85s, since now it gives them multiple tries to farm for a rare mount chance on lockout if they have all 85s (and not even all 85s, just a high enough lvl to solo it or around the lvl to get a friend to run u through it)
Basically, even though mounts are account wide, raid lockouts aren't.
This is great for someone wanting to run The Eye multiple times for Ashes of Al'ar, or rare mounts from heroics like raven lord, or the magister's terrace mount. Even Kara horse mount.
Basically, heres how this helps.
Ashes of Al'ar has a 2% drop chance in The Eye. If you have 10 characters that can all run that place, and you run The Eye with all 10 characters every week, in a little over a month, you should see it drop for you! And once you learn it on ONE character, ALL your characters now have the mount!
Good luck farming