If it is true that we can set, it will depend on some of my characters. Some of them that I create are moving towards fan-service-ish, so I won't mind setting things to break. However, on most of them, it will be more "strategic" parts that breaks. If they have a hood, then the hood will break. The upper armor layer will probably break too, but I don't like it when the gloves and boots break usually, so they will be kept depending on the character design.
Jeez I can't wait already, but I know I'll have to unlock a bunch of things before really getting into CAS. Sadly, unlike in SCIV, not all 2P items are available (though some 1P hair, such as Tira's).