this is exactly how a track meet should be produced. Show live events, then in the breaks show taped stuff from earlier in the meet. The announcers arent quite used to it and are messing up some slightly but so what.
I didnt see any of the other stuff this weekend dont have ESPN2 and missed the other NBC. However this is excellent so far.
Also if you see someone more than once(200m semifinals,high jump now) then its a bit more interesting and you can learn if youre not a track nerd what the hell is going on. Obv for 90% of viewers the compelling thing about sport is to see people you know or at least see more than one time in the whole broadcast.