Racial traits based on class would help to make class and race combination something unique an orc would not see magic the same way elves do. But still be able to use it . Also my opinion on orc druid is that is ok because the lack of a shaman class being a spiritual tribe leader could be cover by druids . No shamans means we need druids for orcs, nature is survival of the strongest you are prey or predator, orc will agree on that as a power they can wield in battle.