Aye. That is true. That is also why, if anyone picks it, it'll be used sparingly, and quite probably be of uncertain benefit.

So far, there isn't a single character that has chosen "Farsight" or "Force Vision" which is the power we believe you describe. The means most Jedi have access to, which we refer to as precognition in the power list, is essentially jedi (or Sith) reflexes. Seeing a second or two ahead. 

We detest cheaply made and used deus ex machinae.