First of all, please indicate what episodes show her turning water to ice as a novice waterbender and child waterbenders learning healing since i can't remember seeing that, so i can check and see for myself cuz i remember katara using ice bending against Zuko only when she was able to really pwn him.
Secondly don't you think that you just contradicted yourself? First you said,
"I'm sorry, but ur designation of "the next level" is way off imo."
Then, towards the last part of your post you said,
"Air.. the next level of bending would most likely creating weather such as a tornado and being able to let it loose."
Maybe you didn't realize that you typed it so i'm just asking for clarification.