You mean about one and a half novels worth of actually good stuff, and the rest being all "THE JEDI ARE EVIL BECAUSE THEY'RE USING SLAVE TROOPERS! ALSO LOOK HOW AWESOME MANDOLORIANS ARE!" Honestly that woman poisons any franchise she touches. She did it to Star Wars, did it to Gears of War, and she did it to Halo.
I don't know anything about the Gears or Halo tie-ins, but the way she handled being an Star Wars author (namely reacting to fan criticism by calling her detractors 'Talifans' and writing an essay on her website that compared people who liked the Jedi to Nazis) I can totally see her not doing well with those franchises.
Decanonized by word of Lucas, even BEFORE the whole Disney buyout.
That was actually the reason she quit. She basically took her ball and went home, complaining about her stuff being retconned away even though she was more than happy to do it to earlier authors' stuff regarding the Mandos.
NOBODY liked working with Karen Traviss; when it gets to the point that Lucas has to specifically call out your stuff for being against how he sees it, you know you've screwed up.
One of the best moments in the EU was in the Legacy of the Force series book Invincible where after Karen Traviss had allowed the Mando plot tumor to take over her books in the series and overpowered them to a ridiculous extent, Troy Denning had Darth Caedus kick the shit out of a Mandalorian strike team with barely any effort.