The Elder Dragons were set to be the super powerful big bad.
But none of them were really presented well. Zhaitan fight was a joke while its Risen forces was presented well.
Mordremoth was a bit improvement. Overall the best presented dragon so far.
But LWS3 and PoF REALLLY ruined the dragon's threat.
Jormag and Primordus were almost killed together with powered striped Balthazar using a machine. What is this? If you want to keep them as huge future threat, this should be LAST thing you do.
Kralkatorrik was almost killed in EoD and nearly again in PoF. Its last fight didn't feel much as a huge world threat. Even in the 1st battle it was badly wounded, only caught us by surprise.