Interesting Ideas I would Love. Please add to this.
Race Options / Clans:
Ishgardian
Garlean
Dwarves
Hume
Ronso
Mystel
Gear Ideas:
Dragoon spear that's smaller/ FFXI design
Cid Dark Knight armor to match helm
A F/C banner that's usable. Hold / carry
Cross over Ideas:
.Hack - Net Slum Dungeon / Raid
White Knight Chronicles/ Sun King Fight (Trial)
Log Horizon Akiba Raid (Abyssal Shaft)
FFXI Tavnazia battle a raid or dungeon
Abyssal Shaft could also be a deep dungeon
Open World Changes:
Open World dungeons
Secret monster lairs
Hidden quests
Lore scattered through areas
Hidden mini Bosses
Player VS Player
Arena in Ul'dah usable
Team tournaments 2v2 3v3 8v8 with standings
Frontline Mode 1 G/C vs 1 G/C
Classes:
Blue Mage changed from limited to full class
Puppet master or beast master for pet class
Limit Break:
New limit breaks for classes / effects.
I know it's just a dream list. But it's got some interesting ideas.