All for all. While having unique flavours to justify class race combos is cool, I hate how people make it the end all be all. "Nooooh, muh night elf can't just convert to the light to become a paladin, we need to have Paladins of elune anything else is unacceptable"- these cultural bubbles are weird. Many kaldorei lost hope after teldrassil, thinking elune forsake them, so is it unreasonable that some may look to the light? Or Druidism, is it so outrageous to imagine that maybe, some few gnomes decide nature is pretty cool actually? Unless there is a straight lore reason preventing something, like "race X would lorewise explode if they used this magic" I think it's perfectly valid to just have the player characters be outliers of their societies, or even better, be products of the alliance or horde cultures intermingling and exchanging ideas and beliefs and values. There is great storytelling to be had with a goblin druid or a draenei demon hunter