Theres really nothing wrong with missiles bar the Ammo cost, it costs more to
buy class 9 ammo than class 10. Sidewinders may have slightly less kablamo than cannonballs but are far superior in tracking, in this mod, missiles are best used when someone is jousting you or fleeing in a relativly straight direction, other than that and they are useless.
That's not to say that in the right hands a skilled missile user can hand you your own ass.