It would have been way cooler and realistic if Zoro lost it/injured it badly vs King or Lucci. The SHP have fought Gods, Admirals, Prison Wardens, Special Races, Undefeated pirates, Shichibukai, Yonko, Supernovas, Super clones, Gorosei, King of the World, WSX, 10 vs 100.000 and yet the only remaining injuries in the entire series is Zoros scar vs Mihawk and Luffys scar vs Akainu. That's it.
How can the SHP face all these hurdles, get impaled, slashed, burned, bones broken, skulls bashed, heart stops, near bleed outs and what not with NO battle scars? All of them should have nice mementos of those they crossed paths with. Beginning with Zoro who should have a few scars from Buggy, Luffy catching a deep one from Crocodile and so on. A lot of them should have lost limbs or organs vs top opponents and the incredible Chopper/Franky/Vegapunk (Lilith) should have made them prostethic replacements or ointments/medicine but at least ever lasting scars or even dysfunctions that they have to learn to compensate for.