Are style prototypes from 0.14 usable in 0.15?

[Mooncat]

I know I have asked something like "is there any change about GUI style in 0.15". But that was before FFF #156 came out. And what I got is a simple "No" for that question, which did not convinced me, especially after FFF #156.

So, please allow me to ask the question again, with revised sentence: can we easily port our style prototypes from 0.14 to 0.15?

While we are painfully waiting for 0.15, I really want to update something in my mods. Something about GUI. But I'm not sure whether I should do it now.

[thenameipicked]

The roadmap says that the new terrian is slated for .15, but that the "GUI re-skin and possible improvements" is for .16

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