Again there would be a simple and less lazy solution:

Offer 2 MSQ routes for new characters. One which is a lot shorter but helps them reach the requirements for Dawntrail organically. Retroactively they could offer a way for the player to experience ARR->Endwalker through New Game+ or something similar.

But they made two stupid decisions that makes that impractical. What are they, you ask? Well, forcing baggage from past important MSQ events in form of the many Scions that had their arcs done and are only sticking around because they're afraid of coming up with new characters for the new saga.
Now it's just important that every player invested in the story goes through the past 10 years worth in order to feel the level of emotional attachment and care for what the existing companion characters should be in the current context.
And second, having the main character keep the blessing from Hydaelin even after her story was over. They come up with asspulls all the time, like Dynamis. The lack of blessing wouldn't prevent the MSQ from making us do impossible feats. Keeping it just continues to chain enjoyment of future MSQ based on personal experience with 2.0~6.0.

Whatever option they come up with for the skip, I'm 110% confident it will not provide any organic character or MSQ progression. And they put themselves in this position.