So, I misunderstood your post, sorry, and no harm done… 
To be honest, there are great ideas in the MixConcole concept, no doubt. But, as more and more usually in the Steiny way of doing, the whole thing seems half-baked, with too much issues left that should have been ironed out at first place. Other examples of this way of doing are the RCE or the ASIO guard : they are not actually working as advertised. We are at a point where 6 updates have already been delivered, this through a 10 months period, and still, the whole MixConsole thing (as other ones) seems clumsy, with a strange and erratic behavior (see my previous post and JMCecil one).
Back to topic : to be honest, I don’t think that the overall Cubase UI darkness is the main problem. What is the most irrtating is the removal of efficient UI features without warning, more or less replaced by half-baked ones…