I also agree that the ANC will definately break-up. There are just too many divergent view points and actually approaches to life and politics, and some class clashes, that will never converge.
However, if though I believe Seremane to be capable, i doubt if he is the leader to lead us to race-free elections. But, I think he can take the DA a step closer to mass appeal and thus lead the way to the rebuilding of the DA as a party for all and a credible opposition.
Whether the DA can rule better than the ANC, I do not know, and do not believe it, as politicians regardless of race are self-serving mostly useless individuals in my view. However, we need a good opposition.
In my view getting a popular appeal is not difficult. Go for the voters basic instincts. Look what the ANC and the popular press did for Zuma by persecuting him, the masses quickly identified with him, they made him a champion of the downtrodden from obscurity in a very short period.
May be he can have a campaign that brings it forward that he speaks for South Africa, not black nor white South Africa. May be it might work.