This, hugely. Even if it doesn't result in the person who got no upgrades 41-50 screwing over the rest of the party (who likely did get the upgrades, and will now have those reverted), it creates two different conflicting playstyles. Those who aren't gear level 20+ will need silvers just to enter the next tier, while those who are just trying to get back to 41-50 just want activate and get in the teleporter asap. There's no reason to create those kinds of conflicts for the sake of an arbitrary rule. You could just as easily give an equal chance everywhere and ease the tier requirements.