The Force Awakens (SPOILERS)

[Sephiroth]

Anakin could read minds. He read Luke's mind about Leia. He was even so powerful he did not need this whole hand thing.

He read Luke's thoughts and feelings. It was more like a sensing. As opposed to reaching into someone's mind and extracting the information you need. 'We don't need no droid, I can just read her mind!' In the end he couldn't because she's strong with the Force but the confidence that he could get something as detailed as a map she saw briefly is unlike anything Anakin ever did.

I see no difference between extracting the information "i have a sister" and "i know map x". It was not specified if Ben actually can get access to the total database. And well, he was not able to do it anyway. Also even if he can do some stuff - he once was the apprentice of Luke and now of this Captain Snoopy guy who people even consider to be Darth Plagueis the Wise (Sidious' master and the only one comparable to him).

Not that it matters. Ben still has no chance against Rey. Luke's child > Leia's child. That was more than clearly shown. Now a trained Rey might be the one the force needs (and I am pretty sure that is what is gonna be it anyway as she is the main chara, et cetera - typical good people win story).