I think he has the potential for sure. He took some time to bed in and then got that horrific injury which deffo didn't help.
But, from what little I've seen of him, he's technically gifted (not full of flair, but technique-wise... if that makes sense... ) and agree with a few on here bout his left foot. Also, he's an option from dead-ball situations which would free up Gerrard from that particular duty ( I don't think dead-ball situations is one of Gerrard's many gifts).
Assuming he can recover from the cruciate injury, which can be devastating, and continue to bed-in, we'll have a potentially excellent left-back. The question is will he be able to......
There's hope there methinks.....