As a Roblox developer, it is currently not possible to get the tier of a player’s Premium membership. Before Premium, you could get a player’s membership using Player.MembershipType and it would return with None, BuildersClub, TurboBuildersClub, or OutrageousBuildersClub. Now it only returns with None or Premium.
I was planning on recreating the old Roblox player list with old icons and such (the lowest tier of Premium would be BC, 2nd TBC, 3rd OBC).
If Roblox is able to address this issue, it would improve my development experience because I would be able to add membership-only perks/features that I was able to do for players who had certain Builders Club memberships.