Allow users to choose which earned sub badge to use
Currently there's MANY sub badge tiers, and in most cases streamers are forced to make them look like some sort of "progression" because they change as the sub changes. This often results in a large portion of chat (the longtime subs) all having the one same "final" badge.
The idea here is to remove that uniformity and no longer force creators to make their badges progression-based. Simply add a per-channel badge selector for subscribed channels that allows the user to select from all badges earned up to that point.