Here's a crazy idea but hear me out
An AU where Goosefeather is Fireheart's starclan mentor/guide instead of Spottedleaf
I always believed that Goosefeather could have changed the fate of his clan, but he could never interpret the visions he saw correctly, and when he failed with the burying prey idea he gave up completely.
Now he's in Starclan and he can see that Bluestar is going down a dark path, someone is dampening her fire without her noticing and he knows he'll never get through to her after everything he's done.
But now there's a new fire in thunderclan, a fire that burns bright with curiosity, loyalty, determination, and bravery in the face of the very thing that seeks to put out Bluestar's fire.
Goosefeather knows he failed Bluestar, he knows how he failed thunderclan, but maybe he can do right by this new fire and help him guide his clan back into prosperity.
If only the damn mousebrain would stop asking him where Spottedleaf went.