Don't give up on it, you were just running into those ergonomic limitations of cruisers I mentioned in other thread.
On sportbikes boot scraping is common but it's the front outside edge of the boot you scrape, not the heel! Wearing the right boots on a sportbike, it usually takes awhile for them to accumulate any damage worse than ugly scuffs (worn as "I'm no poser" badges like erased chicken strips) because there's some give up front. There isn't much give to a heel and it might knock your foot in a position you don't want it to be, so that's something to avoid IMO.
I promise the feeling you get scraping boot on a Buell Cyclone is entirely different