No longer diadem achievements obtainable

[Theodric]

If you cared for the achievement you would of gotten it when it was still new.

That's a rather deceptive argument. Aside from not accounting for players who weren't around when Diadem was 'new' some of the achievements were very much a matter of pure luck. I'm one of the lucky ones who managed to clear the emergency mission successfully but I can easily see how others may not have had that same opportunity due to how often groups failed to work together.

Hopefully the achievements will still be obtainable as of 5.1 - and if they aren't then we should have had forewarning that they were going to be removed.