I honestly don't see the issue with this. It's just glamours, people. Ones that are so old and outdated they probably don't see the light of day anymore but would again if new people could collect them all the while bringing fresh blood to the PvP scene. It just seems like a win-win to me.
If people who got them back when they were relevant are still insistent on their unattainability, just make these sets have a clear indication that they're not the OG glam. Different color or slightly different modeling with a similar version but not identical. There also needs to be seasonal rewards for more than just top 100. Seems pretty easy to me. Again, win-win folks.