Seems like the 1# of crystal would give you all the body you need. The black patent might be adding to the bitterness, but some people call nutty, bitter... You could also experiment with reducing the 15 min. addition to .5 oz of cluster. Also I would go with a full tsp of Moss at 15

Er, one more thing, and this could be another part of what you might consider a not-so-desireable flavor. Try a liquid yeast starter like Wyeast American Ale yeast or Wyeast Northwest Ale yeast. I know it costs more than dry but it is fresh and filled with billions of cells to get your fermentation going strong. Yeast(s) can make a huge difference in flavor and even though the dry (coopers/nottingham/etc.) work just fine better yeasts will improve your brew.
Ah, as far as the sugar, how much alcohol are you shooting for here? Sugar will really raise the alcohol level in this recipe. When you say you are 'making this Amber' do you mean Liquid Extract? Dry Extract? or? If you are talking about Liquid Extract that would bump you up to 7# LME, your brew would still have less alcohol than if you left the pound of sugar in it. So depending upon what you mean by lightening it up a hair, you will effectively reduce the alcohol but you will increase the color to a darker amber. Well, duh, I guess if you remove the black patent you will have a much lighter colored beer anyway
Now, if you really want more body you can up the crystal to 1.5# Are you steeping it long enough? 20-30 min at about 170?