I think it was also to make you think that they took the exit aperture that took them back to the Delta Quadrant
Pretty much.
I must admit, the logistics of it don't entirely make sense to me. I mean, why would the Borg knowingly swallow the ship and then keep heading towards the Alpha Quadrant?

From the perspective of the Borg, it would've made more sense to let the Sphere be engulfed by the approaching shockwave so that Voyager would be destroyed...but then maybe I'm better at the evil plans? I don't know...
