Bit the issue goes a bit further than just Raubahn savage.

When Orbonne and Hydatos dropped, we exceeded the DC's instance capacity (in the EU)
Regardless of what you were queuing for, you could be sat in a queue for an extra 20 minutes even with a full party, because the DC couldn't generate any more instances.

That's a peak time, but it's during the end of a patch cycle, so a new expansion will be worse.