Im partialy with OP ...
It is indeed disapointing.
And the reason are exactly Hirelings ...
I mean, you said it yourself people ... we still can use multiplayer workaround ... we will be able to get hirelings possibly very soon ...
So what is purpose of this limit?
Is Larian somehow worried that our Tutorial experience will be so unballanced?

Seems just just like odd decision to me

... they could make many people happy, and qutie easily at the top of that ... and yet they dont, bcs ... well i dont know, thats why its so disapointing. :-/
But yes, hirelings may be acceptable ...
Its like decision between sausages thawed in the sink ... or free BigMac menu ...
But they MAY be acceptable, if they will be fully customizable.
I want my Full Githyanki party ... if Hirelings wont be possible to be all Githyanki, they are useless to me. :-/