70,000 years ago, Homo sapiens sapiens suffered a genetic bottleneck that reduced the population of likely 100,000 to 3,000. Over seven billion people of several distinctive races are descended from those small survivors. Whether or not the supereruption of Toba was to blame is still under debate.
My question is, though, if the bottleneck never happened or was at least delayed, would humankind's racial diversity be greater? If so, through what characteristics?