Just wanted to note that my earlier suggeston gives them the force sight power without the force rating, letting them have just as much (if not more) reason to go into force using careers.
instead of a Force Rating to fuel their sight, which is what causes all the problems, just give them +1 force pip in the dice pool when using force sight (neither light nor dark). that way they can use force sight out the gate, and be just a bit better at force sight than other force users if they progress that path. They cant do any other force things unless they take a force sensitive career, just like anyone else.