I totally agree! The party looks like it was put together by a bunch of 12 years old playing D&D for the first time.
They managed to make a Githyanki warrior in the Forgotten Realms look like the only normal character.
Karlach would have been so much interesting if she had been just cannon fodder from the Blood War, that would have been a chance for a fresh point of view but no, of course she had to be Zariel's chosen.
