...Are you talking about evenness of dynamics?
I can't think of much off the top of my head that doesn't sound better with continually flowing dynamics, than even dynamics.
But I am familiar with your problem of sometimes missing notes from trying to play too softly. The best solution I found was to practice as softly as possible, using your ear and hands to find the softest touch you can get away with, and from that base of control it's easy to add more force. After a week or two of practicing nearly everything incredibly soft, you will develop some excellent dynamic control.
What I found was more difficult to control were the shifting hand positions, like in an arpeggio, sometimes a thumb or finger will come down very quickly and make a clunky loud note. Playing softly will make these stand out even more, and is a good way to remedy that.
...and for gods sake don't make the piano sound like a harpsichord! Bach sounds great with flowing dynamics.