Yang played super-aggressive poker at the final table, but I wouldn't say it was "good" play.
He is certainly the least skilled champion of recent history (maybe ever?). He doubled up Alex K. several times with terrible calls, and made questionable plays throughout.
He certainly got lucky to build a huge chip lead that could absorb the
hands he lost.
The key to his success was recognizing that he was the least skilled player there, and utilizing a strategy to neutralize his opponents skills to the greatest extent he could via preflop play:
He constantly over raised preflop (10x, 5x bb, etc.), which is a good strategy given his chip lead, but also goes to show he has no idea how to play a "small ball" professional style. This "Kill Phil" type strategy was a good idea for him, as he perhaps recognized that he was the "worst" player at the table.
An objective look at the specifics of his play(s), however, shows how poor he really is, despite his good "meta-strategy".
As to Gold, I don't think he is really that bad, and is certainly better than Yang. His weakness is being a bit too "atc" and perhaps liking to gamble too much.
Both Yang and Gold have annoying personality traits (praying, talking, respectively) that seem to bother people to different extents, but shouldn't come into play when evaluating their poker skills or lack thereof.