I think we should talk about more aspects to the ninjas powers actually. Nya gets to communicate with sea life so I don’t see why we can’t expand on them. Let Cole have special powers with gemstones, let Kai cause a heat wave!!
Heck we see Jay use wind in season 1, I know its a mistake but who’s to say that the elements of creation can’t use the other elements that are close to them. We even know from dragons rising that similar elements CAN exist. Smoke/ash is a natural byproduct of fire so there’s no reason Kai shouldn’t be able to have some control over that. Plants grow in soil, so there’s no reason Cole shouldn’t be able to at least handle nature somewhat. Maybe there’s more restrictions to it as opposed to the other holders of the elements, like Ash can use smoke whenever, but Kai can only manipulate smoke that comes from a fire. Bolobo can summon and control plants of any kind whenever he wants, but Cole can only accelerate the growth of seeds or manipulate plants that were already there. Jay can only direct the wind that already exists, he can’t accelerate or create it like Morro can.
