I've seen a younger generation of Republicans (those who I know that serve as state legislators or are making their rounds on Capitol Hill, etc.) that are more willing to provide change and make some concessions on social issues -- but that isn't going to happen for a while on their front. The Republican Party has got to understand that the demographic change in America is going to have a huge impact on electoral dynamics moving forward. They are on the "losing" side on almost every social issue of substance moving forward and will continue to be. Long-time breakthroughs in various states on specific issues have happened the past several elections cycles.
America is a relatively young nation and extremely diverse. Much to the chagrin of many on the right-side of the political spectrum, that diversity is only going to amplify moving forward. The only hope for the Republicans, and it is pretty much a guarantee -- is that Rubio is a part of their ticket in some capacity come 2016. He will help in a lot of areas and provides a boost in the electoral college and quite possibly (by association) the Hispanic Diaspora voting bloc.
As for Mitt's comments, it is not surprising. The guy has tried to buy his way to the White House twice and failed miserably. He is an empty suit and quite honestly, a man without conviction or character. I'm sure he will find solace wiping his ass with Ben Franklin's the rest of his life while he continues to circumvent laws and participate in blatant tax evasion till the end of his days.