Like I said I know that the lightsaber fights were fitting with the story... I just like them, so I'm left craving something more. I'd have been rolling my eyes if Rey had suddenly gone full ninja and started backflipping around using her lightsaber like a Jedi Master... I know that Qui Gon / Obi Wan / Annie were all trained from childhood in an environment with generations upon generations of experience...
I... I just want my glowing sword ninjas damnit!
As for Finn I do think there are a couple of other hints at it. e.g. he takes to the TIE Fighter and Millennium Falcon guns very easily and even comments on it; being "a natural" (i.e. a possible hint that he's actually using the force without realising a lá Annie in his racer)...