Just a suggestion

I hope they'll add a part in the game where you'll send survivors for a run and there's a chance for them not to return (because they got in trouble on their way with walkers or saviors) and then you'll go on a rescue mission to get them. If you don't rescue them within an given time frame, you lose them forever.
If the survivors you sent to go on a run have successfully returned, they bring lots of goodies (supplies, xp, epic/legendary stuff, etc). The chances of getting higher rewards will depend on the level of survivors you sent.
If the survivors you sent to go on a run have successfully returned, they bring lots of goodies (supplies, xp, epic/legendary stuff, etc). The chances of getting higher rewards will depend on the level of survivors you sent.
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I think by sending them to farther areas chances of getting better rewards are higher. But risk of losing them are higher as well.
If there's that risk, it brings the game much closer to the actual tv series.