For people playing on a PC this probably should be second nature.

Additionally there should be a swap position feature. Such as drag and drop to switch two different skills' position on the Actions set.

It's really cumbersome at the moment to try to remove an ability and reposition it to another slot. Such as trying to remove shield's guard from slot 1 and reposition it so you can put a basic attack such as Light Stab for gladiator on slot 1. You can't, you have to remove the shield, reposition your Light Slash, and then equip your shield again.

What's even more frustrating is you have to do this each time you switch a job that can use a shield and want your basic attack such as Spirit Dart on the first slot if by some odd chance you unequipped the shield and reequipped it before setting your skill.