A very good interpretation Unge. Well done! We are cutting off the flesh by means of the word of God. The word of God sets us free. (A blade (razor) is very close to a knife or a sword which is the word of God)
Of course, the right arm speaks of actions and it speaks of a person’s spiritual power and abilities to perform the work of the ministry and to allow God to move through us in a powerful way (it is actions, not influences like with the left arm, see “left body parts”). In a negative sense, an arm can speak of fleshly man-made power but in a positive sense, it speaks of a person’s spiritual power coming from God and the Holy Spirit.
So with this dream, there is a change taking place. The true word of God is starting to remove the flesh (razor)(man-made) power and replacing it with spiritual power and abilities that come from God. So in the future, she will be more powerful in the spirit when she moves out to minister to people.