So I guess the Core plugin really ignored most of the uses for bending other than combat and mobility. So I am just going to suggest a couple ideas for each element to benefit users in daily minecraft life.
Water -
Fertilization (needs new name ik)
The user uses Waterbending to grow a baby plant/flowers on grass. The move would only take one try to fully grow the plant, therefor being a better use than Bonemeal. This move also works to grow grass on regular dirt.
Select Fertilization>Shift on selected baby plant/bare grass/dirtblock> Grow life
Earth -
Morph (name please? xD)
Simply select a block that has the option of being morphed. Shift on the block and it will morph into a specific item that has a good use. Here's a couple examples; While having Morph selected (With Iron Block in slot) shift for 4 seconds to turn it into a bucket. Or shift with a stone block to turn it to lava.
Select Morph>Shift while having a optional block in hand> Block turns to optional item/block
Fire -
Conduction
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Use this move to power red stone or use blocks/doors only able to be opened by levers/buttons.
Select Conduction>Left click any red stone operated block>Powers that block
(Bonus)
Lighter (these names tho xD)
Use this move while having sticks in hand to create torches.
Select Lighter>Shift while having sticks in slot>Turn sticks to torches
Air -
Taming (omg)
Shift on a specific farm animal mob and the either (for cows/sheep/pigs) tame it and be able to ride it at any given time or (for wolfs/ocelots) tame the animal to make it become your pet.
Select Taming> Shift while looking at the specific farm mob>Tame that mob in 1 of 2 ways
Okay that's all I have xD The names are the worst part of each move, but maybe you guys can help?
I hope you like these moves, thanks for reading!