Really wish they will take the time to revamp it before A20. I feel it should apply to the tier as well so that the world revolves less around the player. Like keeping T3 relatively rare anyway, more dependent on zone and POI lootlists and perhaps on GS but by a much smaller factor.
It would be great if the amount of player control and predictability in this case, was more in line with gameworld information (the kind of POI, zone), rather than meta information like player level. Still nothing should feel guaranteed. That would also require less homogenized zones and enemy GS scaling. This already happens to a degree (guns are more likely in SM, medicine more likely hospital, different zombie groups), but both item and enemy scaling are imo too depended on that meta number that solely revolves around the player we call GS.
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