Personally, I'm hoping GM is making some effort at weight reduction.
Ford and Mazda are doing it (~2200 lbs for the new North American spec Fiesta/Mazda2).
Weight reduction is good for EVERYTHING people on this board care about: handling, acceleration, braking and fuel economy.
So I want the engineers to make an effort to get the lead out. ~2550 lbs is porky for a subcompact hatch. We already know the next gen car is going to be a bit bigger ... if they have to make it bigger, it would be cool if they could do it without upping the weight too (or even reduce it).