Read what I said. I didn't say anything about learning or not from anybody, I said it was pointless to have him following the team around without playing games, as it would stunt his progress. As for South Africa having plenty of backup, perhaps finding some that can make it past a knockout game in a 50 over World Cup would be a good place to start. The last time I checked, South Africa weren't this super-power in the limited forms of the game, so putting in new guys in an effort to improve the team would make sense. Unless you just plan on running Kallis and Amla into the ground for the next few years until you realise that they've gone and there's nothing left behind them, apart from guys who know all the training regimes from their 'mentors' but have just never played International cricket.
You can have players having 'mentors' all you like, but it seems a bit pointless if after 3 years of drinks carrying you put them in the team and realise that they're just not good enough. But hey ho, I expect you won't bother reading this and just make up what I said and reply to that anyway.
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On the subject of potential winners, especially with Watson going home soon, I'd back the South African Titans team to win it. They seem to have all the bases covered really.