I bought CB21 and have played the demo on PB21 and am enjoying both, but the one thing I feel that both game are missing and I would love to see sometime is a game progression chart showing how the lead grew/shrank during the course of the game.

You mean like one of those line charts. That would be pretty cool to see

Yeah. I guess on ESPN it's called the Game Flow chart. I know it's interactive there, which is probably too advanced for here but if the graphic were big enough then even a simple visual representation should be readable and cool.