Well that's a matter of preference really. I mean I'd also like to see some rebel stories showing a rebel resistance movement in action for example. Well yes it is and Star Wars would need to adapt it to fit and shouldn't just copy/paste mindlessly (I haven't read any of the two zombie books and frankly I don't think Star Wars and zombie works well). But for that you have to try and experiment (granted something Del Rey doesn't seem interested in doing). An anthology would be a great place for these kinds of stories, so you can see what worked and what didn't. It would also be a good starting point for new authors to try their hand. Black Library does this all the time with it's anthologies, seeing which author can deliver what they're looking for and then giving him a novel or two of his own.