Psssh, I loved it, especially the first two books. And it utterly destroys the weakness that is the LOTF saga.
I don't think Jacen could possibly have been a worse Sith. He comes off almost as whiney as Anakin did in the movies. Mara Jade's death was whack. Ben was a brat for the first EIGHT books. Luke wouldn't step up and get the job done, despite all the beatdowns and beheadings he'd handed out when necessary in the past(Truce at Bakura, etc). The Jedi as a whole were ridiculously ineffective and hunting down Lumiya and Aleema. Bah, such a disappointment.
Did you seriously not enjoy at least the first two Bane novels? I really have to disagree about one-dimensional characters. Huge change in Bane throughout. From miner, to soldier accepting a death sentence to save his troops, to up-and-coming sith, to weakness as he begins to doubt himself, to a return when he finds what he's been seeking. Quoordis going from cocksure to a snivelling wretch at Bane's hands. Kas'im certainly had more to him than just an uncaring blade master. He showed a lot of emotion for a Sith when it came to his interactions with Bane. Githany's willingness to manipulate any and everyone that she needed to. Farfalla and Hoth's arguments with one another. Zannah's struggle to completely lose herself as Rain. Rain's cousin trying to figure out who he was supposed to be. Kaan's deception over all the other Sith. There was nothing one-dimensional about anyone in those books.