in ROTJ luke revealed to leia her heritage and insisted that she could wield the force the same as he could.
the now called "legend" of course followed this path, giving leia numerous occassions to explore her force sensitivity.
TFA gives us nothing in that regard. and with the sad, early passing of carrie fisher i don´t think that will be explored much in the upcoming movie.
she´ll just have some cameo scenes.
i am pretty certain leia won´t evolve beyond her rebel role. i doubt luke was wrong. maybe we will be given some bits and pieces about leia&force but i guess it will be limited due to real world restrictions.
what do you people expect why canon leia never reached for the potential luke hinted at in ROTJ?