Svidler and Miro with the occasional kramnik and karjakin was great. I do miss the svidler gustie duo but we're not likely to get that while Jan is a second for Magnus.
Excuse my ignorance. Is Jan really that good of a player to be Magnus' second? Somehow his laidback style commentary made me feel he was not too serious with preparation
He's a good theoretician, and always shows interesting sidelines in his broadcasts. His job isn't to teach Magnus to be better at chess, it's to be on top of current theory and help anticipate what the opponent's team might prepare. I think Magnus's team has done that very well the last couple of cycles.