In the post-Incardona era of commentating, I think Karl Boyes is the best in the business.
My favorite ever American football commentator was John Madden. He was capable as an analyst of the play, but so were others in his day. What set Madden apart was his incredible enthusiasm for the game. When something remarkable happened, he got very excited, and that's why so many loved him. Anything that got John Madden excited, I reckoned, should probably excite me.
I think Karl Boyes is one part John Madden. When something exciting happens at the table, he gets excited and that's what I'm looking for in a commentator. Karl is one part analyst, one part host and one part fan and it is a powerful package. Jeremy Jones, an extremely capable game analyst, lacks this level of enthusiasm for the play when he commentates. Phil Yates is the happy medium, displaying the enthusiasm while lacking top analytical skills. All three of them are good at their trade but give me Boyes, the guy who gets the most excited about pool.
Finally, as Overlord notes, the commentators know far too little about the players. They need to show up more prepared.