More detail to heart/health display

All Minecraft players (well, most of them) know that a player has twenty hitpoints. These hitpoints are displayed with hearts, each representing two of twenty total hitpoints. A diamond sword does seven attack damage, or 3½ hearts. Sharpness I adds half a heart of attack for an even four hearts of damage. Sharpness II, however, only increases attack by .5, something that the current health display cannot show. If hearts were able to show in fourths, health and combat would be up to date with each other.