Time to start saving.
A ground mount would be worth the coins, since Island Expeditions are done using ground mounts. None of these rewards are that interesting, otherwise.
A shame that we cannot buy the items of the Island Expedition. They area real pain in the ass to farm :First the right mob set should be available this week, then you have 1 chance outta 3 to get the expedition on the right island, an finally you must slay every mob go get a chance to loot ont of the item on the table of the one you want... like seriously Blizzard? So much RNG, almost impossible to get... and I know what I am talking about as I needed 390+ try on yogg to loo mimiron's head !