Third slot for equipment???
How about an additional slot for equipment on players. For example, shooting glasses that may increase chances of critical hits or a helmet that increases protection, also an actual silencer that increases chances of not attracting walkers to something more realistic like 80%. These could be upgradable or not or maybe only available to legendary 5 star characters. A nice reward for working your way up. There could also be a downside to using some of these, maybe a silencer decreases range or a helmet decreases your peripheral visibility. All kinds of cool ideas here, lucky rabbits foot, I could go on all day.... Let me know what you think and share your ideas for more fun equipment with perks.