SE does not seem willing to redo those two instances and their internal cutscenes - thing they admited was a mistake.
They implemented forced cutscenes to ensure, that new players are not robbed of the story.
Then they implemented super XP rewards to ensure, that new players get enough people to run the instance in first place.

If you are re-running this to reap XP for Alts as we all sometimes do, you are accepting the price - that it will be time consuming.

The only solution for this would be if SE redo it completely, or allow players to run these with Scion NPCs - like a new Trust system.