I see Mac Walters is now the lead writer, no sign of Drew Karpsyhn on the writing team this time.
I think Mac Walters has been the main writer through the series so I wouldn't think there is much to worry about there.
Playing through the dlc Overlord in ME2, about experiments with Geth and a Rogue AI, I took Tali along thinking she might have at least one comment to make about the whole thing.... Not a word from anyone though![]()
I hope with future dlc they make more of an effort adding lines to all the characters and not just Shepard, for the amount of dialogue there is in the dlc I wouldn't have thought it would be that much more of an inconvenience.