Hello just recenlty joined the forum, moslty i'm lurker and not very vocal, but i'm a great fan of Minthara like you! My love for Drow's romance started with Viconia into Bg and i'm happy to see Larian gave us a chance to have properly Drow Romance for us.
I hope they will make her a full companion later in the game and i hope you can finally give a full evil playthrough instead of Bg2 where you often were forced to get some good choices.
Also in the first run i miss the whole romance and i replayed it expecially for it because in the game you have 0 reasons to join the whole Minthara plan except for fall in love her madly at first sight and start doing mindlessly her biddings.
I hope they will give us more reasons to follow her at the start