As you probably would expect, considering the long-ago confirmation of EFT-like sectionalized clothing (including the principle of chest rigs and pockets), I’d be okay with this system if it only allowed you to assign items from places you could logically quickly access, as @linkfanpc was saying.
- Easily accessible pockets (this would be a per-clothing basis really, but the primary example would be almost all conventional pants)
- Chest rigs, for grenades in addition to magazines/clips
- Holsters, sheaths, etc for weaponry specifically, just mentioning this anyways even though it’s already semi-implemented
You should not, for example, be able to set quick slots to a bottle of painkillers siting literally in the bottom of your backpack, and these quick slots still wouldn’t be instant either. Ideally every item has an equip speed that is determined by several factors, with the clothing/storage of choice being the main one. Quick slots would just make it more convenient to begin the equip sequence, and I’m purposely leaving the usage sequence out as well since you should always have to manually initiate this (it prevents a lot of accidental item usage too).