Hi everyone,
Yes, there are plans to implement a way to change the usernames individually. However, it is a bit hurt by cases of lost organic traffic and link authority (Oh, SEO talks..). We still have this feature in mind, and it should be possible to do in the future.
Can't say yet, how far/near in the future, but hopefully you have some patience, as good things come to those who wait!:)
VitLoss, I'm not sure about the product transfer - and wouldn't your royalties suffer a bit? Do you mind waiting a bit longer as well?
Regards,
Eddie, CGTrader