Well I think that they lost the ICC licence part way through development, you also see unlicensed Australia/England logos in the game (which look terrible), like how the previous editions were only licensed in the World Cup mode. So part of it was just that they didn't have the licences to include the modes and part of it was just not having the time to include some features.Why did they cut most of the game?
Most of what was missed in AC09 made it in to IC2010.