Rocket League is set to get Easy Anti-Cheat in April, as the Epic Games owned studio Psyonix just recently announced.
Posting on Reddit, a Psyonix dev mentioned that there will be options to run the game with Easy Anti-Cheat enabled and disabled so that mods will still work but not for online games. Additionally, thankfully, they will not be breaking running the game on Linux platforms with Proton as it will be enabled.
If you could see exactly where the ball is going, or where it will land, and others cant, then its a slight advantage. Not as much as wall hacks or god mode, but statistically significant.
It would be like having a reticle on Goldeneye 64. A recording of the game would make the user look better at prediction.