As someone that suffers from neck and shoulder pain I half agree about the balance but my solution is Gotoh Res-O-Lite machine heads. With typical machine heads weighing well over 1lb or 500+ Grams, hanging on the end of a long lever, the balance issue is mainly with there. Of course the Hipshot Ultralites weigh a similar amount as the Gotoh Res-O -Lites.
Another ways to improve the balance is 2L 2R headstocks and move the rear strap button closer to the top of the body.