Doesn't Radiant vs Dire have an almost exactly 50-50 pro record though? The Roshan advantage is good but always seemed to be offset by the superior Radiant offlane and jungle layout. With the new Rosh access it looks like Dire might just be inferior now.
Map changes worry me, balancing that asymmetric layout has to be insanely hard but it looked like they just about had it before this.
edit: Reading the changes now, they at least nerfed Radiant offlane and buffed Dire, so that's good.