When you have and object selected and a fill or stroke color is applied to it...and you want to create a new swatch using a different color...a "Preview" box in the New Swatch dialog box would be helpful so you can see how it would look before accepting it. Currently, ID will apply your new swatch to your selected object(s) after it's created, so allowing adjustments at the same time could cut down on an extra step should you need to tweak the color.