Just and Update:
I just bottled my remedy yesterday. Overall the color was a bit more cloudy than the original (as a result of the DME brew I made), but not terrible. Just like a cold glass would look. The taste even at this point was pretty good considering where it started. Tastes are upfront fruity and sweet and finishing clean. ABV came out to be ~5.6%.
Overall my predication that the actual bitterness will be less than predicted value was correct. MAking a sugar brew and an overhopped brew and mixing together, resulted in hop utilization being lower than the calculations. For something that should have been a dry brew, this is really sweet. In the future I would probably lower the target OG, total amount of hops and aim for what I originally wanted rather that where this fix landed.
All that being said, this was a great experience for me to learn that you can take a brew that is misbalanced (even after you bottle it) and remash for a whole new brew. It is probably impossible to correct a brew compeltely to get exactly what you want, but home brew can definitely be "recommishioned". So in the end, no matter how bad you screw up (outside of contamination), it ain't over til its over.
My final comment: If you buy that book (due to its relative cheapness and availability electronically), just forget the recipes. The guy who wrote it obviously either never made a brew in his life, or never made one at the volume he suggested (as he screwed up the recipe conversion beyond recognition).