When I first saw it I thought the purple mini-turbo would be an insignificant addition to MK8D, but it's actually pretty nice. Doesn't change the game in any major way, but I like how it adds a new layer of learning to the tracks, namely where n when you can go for the purple sparks. Also it seems like an indirect buff to inside drift as I find I can get purple sparks more often than with outside drift, but maybe that's just me and my wishful thinking.