I could not stand the villains of the Dark nest Trilogy, specifically how their biology worked or how a bunch of characters were screwed up by it. The other SW writers seem to have agreed, because
Besides that I just felt the trilogy wasn't very well written or particularly compelling, and thats saying something because I love 90% of old EU books, even ones most people don't like (like Darksaber, for example).
the series ends with Jaina and others still possessed by the bugs, but that is immediately ended/ignored by every book set afterwards, with the explanation being that the effect just faded from them eventually once they weren't constantly with the bugs and presumably no one wanted to rejoin once their heads were clear of the possession.
Besides that I just felt the trilogy wasn't very well written or particularly compelling, and thats saying something because I love 90% of old EU books, even ones most people don't like (like Darksaber, for example).