Not That Hera Would Be Able To Sense That Herself But I Think It Implies They Seem To Agree Sabine Isnt Force Sensitive - Tumblr Posts
So, regarding the supposed hints to Sabine’s Force-sensitivity in the trailer: my two cents is that she’s not, but that she wants to be.
If Sabine were Force-sensitive, I think she would have discovered it during Trials of the Darksaber. Force-sensitivity isn’t easy to hide; I doubt she could have lived with two Jedi and all their weird Force shenanigans for half a decade and not figured that out. Adding it in now wouldn’t make sense, and it would kind of be a disservice both to Kanan and Ezra’s stories and her own.
Instead, I think she calls Ahsoka “master” because she continued learning about wielding a lightsaber from her. Through that, I imagine she got to feel closer to Kanan and Ezra, and I think as time went on, she probably started yearning to wield Ezra’s lightsaber in the way he did, and Kanan did, because she’s so desperate to feel connected to them again. When she raises her hand in the trailer to call to the Force, I’m betting it’s just out of desperation to see that wish fulfilled, and when Shin tells her she doesn’t have any power, I think that means she failed.