But we still can completely disable the raytraced preview, can we ?

It isn't an "all or nothing" feature tied to the rest of the preview settings ?

I've spent a lot of time optimizing my lights and skin shaders to perfectly work with the OpenGL hardware shading preview, so my need for an additional raytraced preview showing me what's going on in my render is pretty much nil right now.

(See demo pic: Full SSS render on the left, OpenGL on the right)

If "Enhance multilayer transparency" wouldn't massively slow down my OpenGL preview, I might actually stop rendering at all. Lol.

But seriously, basically the only things useful for me among the new PP-2014 features will be the Firefly speed improvements, but if they come at the cost of slowing my OpenGL preview down, even those would be useless.