There are some subtle updates - apart from the pitch and outfield options, the roof designs, though the same, have been improved compared to previous versions. The rear of the stands has been improved with some glass windows. Maybe there's more, I haven't tried the demo yet. But yes, I was really hoping for some more - press boxes, couple of more roof options, crowds on grass banks etc. For me personally, it would be the difference between a buy/no-buy decision. So far I've bought all the Big Ant cricket games so hope to be impressed this time too.
Also I do understand the dearth of updates though, it's hard to justify investment in a supplemental tool when the game itself is receiving major upgrades. Just me being opinionated on what I'm passionate about