Different coloured dice with same function is a really really bad idea. These yellow/black and grey/white were hard to read, even casters couldn't tell sometimes. I'm more of a casual player and when I saw the yellow dice in final game for a moment I thought FFG had introduced new dice to the game. You know how some of their other games have more than 2 colours and people on forums have said that would be a good improvement for X-Wing too. Nathan even switched dice mid-game for some reason. Perhaps he was asked to by FFG so they can promote their ugly dice.