I really can't think of very many sitruations where taking Preditor (or perhaps outmanuver) wouldn't be better than Expose for 1 point more.
Gaining an attack die is not the same as reducing a green die or re-rolling one of yours. What about Maulder Mithel with Col. Jendon and a Fleet Officer. You get within range 1 of a target and you get to roll 5 dice with a Target Lock and a focus.
@Hrathen: Yes, but there are other things in the game that can give you the Focus or the Target Lock. Someone with Squad leader or the afore mentioned Col. Jendon and a Fleet Officer.
Edited by heychadwick