As someone whose very long relationship nearly imploded after being on opposite schedules for a few years, my guess is that WoW is a scapegoat for some larger issues for you two.
It's REALLY rough to live with your partner and never see them awake. And it sucks to feel like you're just doing what you need to do to get by and pay rent (working shifts) and feel like your partner needs more than that, but you have no waking hours together. At that point, everything that seems to be "getting in the way" becomes a major roadblock. I'd rather play WoW in another room than hang out in bed next to my sleeping partner and try not to wake them, but my partner also sleeps better knowing I'm there. So... we had to make some changes together so both our needs were met.
Long story short, you've got a lot stacked against you. If you value being with each other, you both have to come to the table with what you need, what you want, and what you're willing to compromise on. Come up with time and activities to spend together and it's much less likely she'll feel abandoned by your playing WoW (even if it's when she's asleep).