It sounds like Our PC (including if you chose an origin story) can be respecced to level 0 however there is no way companions can be reset to 0. Their story is tied to their level 1 class. I'm sure any respecc will only allow us to multiclass inclusive of that first level dip.
Common sense, otherwise there is no narrative.
I think the confusion came from the difference between origin characters and companion character respecc
JMO Also its a single player game with no pvp. For the min max crowd, have at it. Go play on tactician and change your spec /build every fight if that makes you happy. It's not a competition. It's a single player/co-op RPG
