Teemo should be reworked to a jungler.
As it stands, Teemos role in the game is as a top laner, albeit not a very viable one. His gameplay also really doesnt feel like it belongs both for his position and from a lore standpoint. I feel his kit should be centered around a jungler who focuses on guerrilla warfare who makes anyone afraid to step anywhere near his jungle or even their own. If i were to keep some elements to his kit it would be his stealth mechanic yet revamped to fit more with the rest of his kit, and keeping the shrooms, having them mark targets who hit them that make teemo want to prioritize them in a way.