I share the bike with my wife. She didn't like how tall the front was against the tank. I agreed. It was an improvement over stock in that it doesn't slide you forward into the tank so much, but I don't think it needed to be sloped back so much. I decided to level it off. I also got rid of about half of the bowl/saddle effect you are mentioning.
This is the profile angle I settled on after three sessions of cut/test. You can't see from this angle, but I rounded the edges more than the kit originally came.
With the electric knife, rasp, and air stapler, its so easy. The tool I used most was the rasp. Like I mentioned before, once you get going and get a feel for what you want, you are really sculpting.