And there are symbolic connections between Rey and Obi Wan (have to keep resisting the urge to type Ben). She safeguards a droid with a vital MacGuffin; she delivers Luke his father's lightsaber. We see her sneaking around Starkiller Base in a way that totally evokes Obi Wan's Death Star jiggy jog, and we have Obi Wan speaking to her through the ether. Someone in the first or second spoiler OT did a really good job of explaining it, so I know I'm missing stuff, but there is a plausible foundation there.
Again those, these are all remarkably weak, and are conclusions drawn by people specifically looking for connections. Let's look at all of those:
Rey + BB: The problem with this connection is, Rey isn't the intended vector for BB, Leia is. Rey only happens to find BB in between Poe sending him off, and Leia finally receiving him. R2D2 on the other hand was intended to be sent
directly to Obi-Wan. So the comparison is already quite weak. What really ruins it though, it that it's almost an exact 1:1 play on Luke's connection to R2D2. In both cases the young hero receives the droid from junkers and, by carrying out the droid's mission of delivering the message it carries, is thrust into their hero's journey.
Rey + Lightsaber: Her handing over the weapon at the end of the movie is already a very weak analog before even digging into it - other than Luke receiving the same light saber, the scene and its meaning are entirely different in every other way. On the flip side, there's a
much stronger analog earlier in the movie with Maz handing the saber over to Rey. One that puts Maz in the Obi-Wan role (wise old mentor handing over the weapon she was destined to receive), and Rey in, again, the Luke role, only this time they twist the scenario by it becoming a rejection of the hero's journey rather than an acceptance.
Rey on Skarkiller: The problem here is, well, Han, Chewie, and Finn also sneak around Starkiller in a similar way. What's more, it's Han who plays the closest analog to Obi-Wan out of all of them, as he's the older mentor character who offered to take in the young hero, who split up from the heroes in order to disable the base, and who is struck down by the movie's main villain before our hero's eyes, pushing them forwards. Again, we have Rey playing the exact same part as Luke did.
Obi-Wan speaking to Rey: Well, so did Yoda. And Obi-Wan spoke to Luke throughout the OT as well. And Qui-Gon (at least attempted to) speak to Anakin in AotC. So this one is almost completely meaningless.