nah. smaller men have been beating bigger men at HW since it existed. it's about skills just as much as it's about power at HW
Some guys can look in good shape at 300 pounds. Shaq was 300 pounds and he looked decent. Either Klitschko would still look fine at 260 because they have the big frames.
No Superhwavyweight Division! If you can't make more than 210, 220 pounds like Spinks, Holyfield, Byrd, Haye, Adamek and Roy, you work on footwork and hanspeed. Remember Spinks vs Holmes, Holyfield vs George Foreman ( or Valuev), Byrd vs McCline, Haye vs Harrison, Adamek vs Grant, Roy Jones vs Ruiz? Or else remain at CW...