We will most probably see that in his spin off movie :)
And i had goosebumps when i heared Alec and Ewan talk to her, let alone when Yoda said its energy surrounds us.
Her fighting style is the same as old Ben's, plus everytime she did someting Force or lightsaber related you hear the same music played as when Obi did something.
If she is Luke's Daughter then it's really stupid.