I've been thinking that it would be good if the mounts were used for both terrains, for example, articuno is a volvador and could be both on land and in water, legendary dogs would also serve because in the series they walk through the water, I think it would be more fun because each one would have the frame that he likes for everything, besides being a saving of coins for those that cost him to do pvp or earn money. I think it would be fine from my point of view and I think the players would also like to see the mounts like that.
A greeting.