WaterManipulation is currently the most basic water move with 0 extra functionalities other than redirection. This suggestion however makes WaterManipulation unique. WaterGimbal on the other hand, doesn't describe a unique ability with unique features. It provides 0 differentiation and is a steaming hot mess ready to happen.
It uses the exact same usage as Torrent, so if someone accidentally clicks with torrent twice then tries to use it it will go into combo mode. It has minimal actual use since Torrent is so similar in its functionality as well. Its only unique feature and addition to torrent is that it breaks blocks instead of creating. It also goes in a straight line, yippee! We should totally copy AirSwipe, turn it so its horizontal, and make it go 40 blocks and stop its arc. Oh wait someone already did that its called AirBlade, and there is a reason we haven't added it to Core.
While other suggestions for WaterManipulation changes are good, this one is easily implemented along side our current plans, it looks good, its well thought out, its fluid. It makes Waterbending more realistic pertaining to the show, and adds unique features to an already very bland move.
Oh and by the way, when I said exact copy, I wasn't using figurative language.