*Make all First Class Strength Chocobo as fast as, or slightly faster than, a rental and allow traits and secondary stats to enhance this further. Max Endurance already allows a Raised to last longer than a Rental, if I put the effort into it, I should be able to make a superior product in every area.
*Elmininate whistle charge costs or lower them to at least 70g a charge (making them cheaper than a rental even at lvl 20). Why should I be paying more (or any) gil for something that I own?
*Allow Raised Chobobos to go places that rental chocobos cannot. Being able to call a chocobo in places like Qufim or the Northlands would make many things much less unnecessarily dangerous or time-consuming. Also, now that chocobos can be used in Grauberg, a place with Hippogryphs, the 'we don't want people to get by True-sight mobs' excuse frequently inferred when speaking of Ulegeraund Range is also pointless.