Stop misrepresenting views. People weren't asking for a reboot, they were pointing out that as it stands they are extremely undiverse in a way that makes no sense.
Also, what would be the issue with a 'reboot'? Are you that concerned that a bunch of characters who are dead, who won't feature in the game, might suddenly be a different ethnicity to you? What on EARTH would be the issue if GE did that? I mean, they've retconned way more important things than that in the past. What exactly is so important about the Primarchs all being white Europeans? Compared to how the Necrons, the Chaos Gods, the Squats, the fall of the Eldar, the entire timeline issues and everything else that's been changed in the game what would shifting some characters ethnicity?