Remember in FF5 changing classes back and forth changed your equipment loadout? IDEA: An option to 'save' your equipment loaded to a class, as available.
FF15 does that. Well it gives you a bunch of slots to create whatever equip sets you want. Changing jobs is as simple as choosing an equip set. It's a great system that should be in more games.
This is a good idea in any kind of game where changing equipment frequently is common! The "loadout" idea worked really well in games like Call of Duty and TF2, and MMOs have picked up on it as well. If your RPG has a lot of different party / skill / equipment customization and it's something you want players to switch between easily, I totally agree, saveable loadouts are beautiful :)