I see this happen far too often on MMO boards. You just can't isolate one class ability and compare it to another class' ability. Taken out of context of a class role, resource management, spec, complementary abilities and so on the argument becomes completely meaningless.
Marauder normal attack? Assault, 4 meter range.
Mercenary normal attack? Power Shots, 30 meter range.
Solution: Buff Marauders, needs more Power Shots.