So how much of endwalker will be the horrible suffering of having to play as random scions?

I want to play the character I made. Not as the devs characters.

Now the ONE exception to this could be the scripted loss fights. If you are going to force me to lose no matter what I do (nevermind that should never be a thing, just make that nonsense a cutscene) then losing the fight as another scion would be okay. Enjoyable even.