In regard to dismount

[Lithera]

No autodismount on use of an action would get really annoying really fast as you will wind up accidentally dismounting at inopportune times and it would interfere with future actions that may be possible WHILE mounted as well as the projectile attacks on some of the mounts.

[Assirra]

Then make it a option in the character option. I always have it on in any game that it is possible. Just makes for smoother gameplay imo.

[Gor]

Meh i was sorta hoping it would be about auto-dismounting when you use an ability.
So many times i have been trying to spamm heal to realize i was still mounted.

Easy workaround by macroing all your healing spells. I did that with my blm so i could dismount and then cast Night Wing as soon as i got to the flag and could put everyone in the front of the enemy team to sleep as they came around the corner. it buys us some time until my team can get on the flag point. and since the enemy team is 90% of the time still mounted when they come around that corner, they can't break it until they get a leeches or an esuna. just replace "night wing" with whatever healing spell you want to use.

/micon "Night wing"
/mount
/ac "Night Wing"

and yea, an autodismount would be nice as well as if it worked with talking to an npc. yea i'm lazy like that.