I don't see a problem with someone updating the HE WB skin if they wish.
All the skinners who worked on the group project would be happy I'm sure, for someone to do an update......provided it follows the existing style and detail....and includes the permission text that went with each skin release.
If so done, it would be essential for it to be checked first before release...and then submitted to ALL the skinning sites, as the originals were...