Ithaca How one overcomes that, I don't know.
I have a couple of aids to help me notice that. One is to listen to my recordings. My DP setup allows me to instantly playback anything I just practiced. Another is "velocity graph" - it's a Pianoteq feature that shows exactly what dynamics I played in terms of key strike velocity.
Now, the Downton Abbey's Faber arrangement also marked the opening right hand theme forte which was also part of the reason of the hammering. The first, slower version I played, although sounded better, was not played at forte. You all are absolutely right that the hammering did not sound good. And I later found the dynamics that comes out better.
Still, I have the feeling that to be able to control dynamics or touch requires some other more basic parts of playing (notes, rhythm, etc) to be so proficient that they can be done almost subconsciously to free up the brain's bandwidth. Along that line of thought, maybe I should have given some of my pieces more time? I do have my own opinion of standard on when to move on. But I won't know what I can't hear or should hear. That's why I really value you and others critical opinion.