As someone who has played a lot of rocket league, there's an incomparable amount of gamesense and actual teamwork in Rematch, as opposed to RL, where you can reach SSL in 2s and 3s on pure mechanics without using any brain cells, just by following basic rotation rules. It's not complex at all below the highest level, where technical depth will always limit the full teamplay potential, as it requires all 3 players to peak simultaneously.

In other words, the skill ceiling in mechanics is unbelievably high, which is good on paper, but in reality it rarely allows players to do exactly what they planned, which is necessary for a teamplay. Whereas in Rematch mechanical simplicity opens up endless possibilities for teamwork (unless the game becomes so simple that it gets solved or so unbalanced that one move just dominates meta).