I thought he made it very obvious that he was not fit to be President. The "lower 47%" comments demonstrated that he was not at all interested in being the President of all US citizens. Quite the opposite is Trump's campaign. Everything about it has been inclusive with free rallies for everyone instead of private meetings with deep pocket donors.
I personally thought it was a very valid point that took guts to raise. He raised it inartfully, but it deserved discussion. Too bad more Republican didn't help him out when he did it.
The point was that we had almost half the population who are net recipients of government payments. Once you cross the 50% point as a nation, you're arguably toast, because the majority can then simply vote to enrich themselves at the expense of those who produce wealth.
It's not PC, and it wasn't calculated to appeal strongly to a set of potential voters. So, you're right. Trump never would have said it.