It was shown that practically master waterbenders could control not two, not three, but multiple currents of water without even having to look at a source, which our plugin requires waterbenders to do before WaterManipulation and IceSpike, etc., as those are the moves I believe you could be addressing.
It was shown many times in the show that waterbenders can either quickly shoot or bend multiiple supplies of water in sequence, or even at once. I believe that the ProjectKorra team did not make water, as you said "spammy", but rather were gracious and dialed down the true possibilities of waterbending. If you are going to post a suggestion, please back it up with true points, because I could say multiple people disagree and that this post is honestly in the wrong place, or in general, not well thought out and put together.
Sorry if any of this sounded harsh, but I hope you take it into consideration. If you would like, private message me later on once you have read this and I will delete the post as it is quite large, thank you.
~Apple</3