Pretty much what the title says. In elytra pvp, your elytra can break. While this may not seem to big of an issue, it does get annoying occasionally. Although people often die before their elytra breaks, it's sometimes a different case for me. You can't purchase elytras like you can with armor. Elytras also don't provide any armor. So maybe add elytra to the store or make it unbreakable.