If you don't find dratinis often in the wild and you're out of 10ks, you might as well.
80% is fine and that IV distribution is pretty good, since 14 attack gives more CP than an equal amount of stamina or defence, and 11/15 stamina IV is pretty good when stamina is dragonite's lowest stat.
11 stamina is just 3 less HP than a 15 stamina dragonite.
you're more concerned about moveset with dragonite. even if you did find a better dratini in the wild, there's no guarantee that the higher IV one would have a better moveset.
one issue would be if you're planning to use it to defend and you don't have another dratini to walk as a buddy, so that you can continue gaining candy in case you do find another dratini with good IVs. if you're using your dragonite to attack, this won't matter.
