As to my comment about the relaxed arms and hands, I suppose it's possible that your sensations are not in accord with what I thought I could see. Also, you should remember that complete relaxation isn't possible. More accurately it might be described as an attempt to minimize tension so as to allow maximum flexibility and agility. All these ideas might be better illustrated in person by an accomplished teacher----maybe you'll decide to try that path someday.
I believe that while there should ideally be a balance between the fingers, arms, wrists, etc, in actual practice, now this or now that part may take precedence over the others. It's a tricky series of interactions, one that probably has to develop slowly over time.
As to your dynamics, I didn't hear a uniform "insensitivity" resulting from incessant loudness. On the contrary, I thought the softer sections were nicely delineated. Of course I always have to consider that I might be wrong-----see what some of your friends say (if you ever play for them) and listen to your playing with an open mind----Preferably at a distance vis-a-vis recording-----I believe it was Glenn Gould who said that the tape recorder was his most important musical instrument (paraphrase)
Anyway, keep up the good work, I think you're on the right track.