Yes I'm hopeful the Origin Companions cannot only be respecced after that first level in their story-class. Let's be honest, that initial class is part of their narrative, and destroying that narrative by changing level 1 makes them no better than hirlings with romance options.
What's the point?
I think level 1 in their core class/level 11 in a multiclass ( if we so choose) is enough flexibility
JMO
No reason to give complete level 0 resets for companions if there are so many hireling options.