So, I'm still a newbie to all this, but I do think that your W's passion for you can return!
Like someone else said, she's still working on herself. Maybe she can't focus on her physical feelings for you RIGHT NOW...but that doesn't mean she won't ever or that those feelings aren't there.
Remember, don't believe anything they SAY right now. She's NOT going to tell you if she feels passion toward you.
Before all this MLC crap happened in my marriage, I did go through a period a few years ago where I was just not attracted to my H anymore. We were going through a rough patch, and my negative feelings toward my H affected my passion for him. Guess what? It passed.
Honestly, I'm more attracted to him now than I ever was before.
She'll come around. I'll bet the feelings are still there. They're just buried. I think for a lot of women, if we're unhappy or sad or dealing with stuff, we put passion on the back burner. Hang in there!!