[mako]

Regarding Finn and his lightsabre use

Spoiler!

Being Force attuned is not a requirement to use a sabre. Case in point is Grievous and his quad-wielding. Having the Force though greatly enhances your ability with the sabre (deflecting blaster fire, Force throw/retrieve etc.) Having weapons training is sufficient to fight with a sabre as evidenced by Finn though he got whooped by both the trooper and Kylo. How Rey was able to hold her own and beat Kylo we will have to wait and see in the next episode.