twocats What was happening was that the piano was so loud that my touch was instinctively light, so to play softly I was lightening my touch to the point that I was only playing ghost notes.
So then I don't think the una corda makes the action feel different to you. It seems the issue is that it's difficult to play pianissimo on your piano without hitting ghost notes. This is intriguing because I'm not sure if I'd say this is just because your piano is too loud. For example, my piano IS loud, in the sense that it would be difficult to play pianississimo (making it produce barely audible sounds) on it. However, what happens when I try to play too soft is that the keys sometimes wouldn't even go down sufficiently to engage the rest of the action. This is different from true ghost notes, which happen when the key is pushed down with such a low velocity that the hammer does not hit the strings even though the key went down sufficiently. So whenever you try to play too softly and no sound comes out, would you say that you are getting true ghost notes on your piano, or are you just not pressing the keys deeply enough to produce sounds in those instances?