It's hard for some authors to work with characters they didn't create or help develop. Look at the Travissty that took place with Mara Jade. (yes, the misspelled pun was intended)
But seriously, Allston still rips Traviss a new one in the writing department. lol
Those book series' themselves were just wrong, imo. After reading up on them, and actually reading a couple novels in the series, they really don't have the "Star Wars Feel" that the previous novels had. It shouldn't be about "What well liked and established character should we kill off now?"
Well Karen Traviss is easily the worst writer to ever pen a Star Wars novel. Her hatred for jedi and unabased worship of the Mando's made me want to pull my hair out. Also the way she handled Mara and her death was unforgivable. Add in her arrogant and *****ly approach to the fan's rightful criticism and you have one writer who should never write for Star Wars again. Luckily the combination of her attitude towards fan criticism and the headaches her writing caused for Denning and Allston contributed to LFL and Del Ray to end their relationship with her.