Macedonian navy? Ok, there was one.Honestly, if you look at Alexander's battles the cavalry played a much more significant role then the sarissa infantry. The phalanx was mainly use for holding enemy infantry in check while Alexander with the companions, Hypaspists and light infantry won the battle. Hammer and Anvil.
Definitely, Philip put into place an entirely new military system with considerations for organization, intensive training programs and logistics. The expansion of the Macedonian cavalry arm and its formation into ilai (squadrons), the introduction of an engineering corps for siegecraft, the founding of the Macedonian navy all can be attributed to Philip. His accomplishments go well beyond the introduction of the sarissa.s
What you're avoiding is philip's copying some of the military solutions from his "enemies", the scythians.