...open-ended game...
...absolute statements about what characters are supposed to be or not be...
I dunno. You play the thing so it works for you, and I'll do the same, hey?
If one of the available options feels weird to you, don't do that then.
Power-character design is potentially unbalancing. If you don't want to play unbalanced, don't do that either.
Neither of those is hard, and you aren't telling other people what they can or can't do with the game *they* bought.
If you don't ever want to risk maybe ending up with an unbalanced character and having to play like that, then a beta of an open-ended game seems like kind of an odd choice to me. But whatever works for you.
In any event, right now you can't respec, you can just change your appearance if you're tired of staring at the avatar you started with.
Respeccing the hirelings isn't something I personally need: I'm guessing there will be more than two in the full game, they seem to have strong characterization, and it's just part of the story to work with them.
But if Larian decides to add that option, well, I don't have to use it, do I? So whatever, really.
And once the ability to mod this puppy kicks in? You can do whatever you want with this whole issue anyway.