Cavalry is very devastating in M2TW the EB team will most likely see to weakening it a bit but still cavalry will probably be very dangerous to non spear units.
And Hoplitai haploi do tend to surprise the player. In a fairly decisive battle they saved my army from certain defeat by killing of 3 elephants (while loosing only 5 men themselves). so don't underestimate levy hoplites!!!

Important for cavalry to unfold their full potential is to give them enough space to take up speed before charging, as mentioned in the linked threads.