Don't see why people are looking at Diadem as 'catch up content'. Catch up content is when loot lockouts are removed (Alex), new ways to get gear are provided (VA), raid-exclusive items become available outside of raid (Hunts, VA). Diadem is a different matter, and so shouldnt be lumped as catch up content because of the patch it made its debut in.

As for it being there to give people 210 without raiding, that's what the upgrade items are for. As was the case in every previous instance. I have no issue with twine/coats being available outside of raiding, because you can still make a distinction between non-raiders' and raiders (as the former will be Eso 210, but the optimal build will come from mixing Eso and Gordian gear). Diadem though disrupts this whole balance. The best gear possible now can be achieved with less effort and with no lockout. Why even keep Savage on a lockout at this point then? Might as well remove that too.