Aha! I knew there was a good reason to attempt a full ODI. Yes, modern rules limited overs rules, including the batting and bowling Powerplays, are in force. When available, players are prompted to take a Powerplay, with the bowling team getting first choice. In retrospect, it could get a little annoying to be asked 20 times if you want to take your Powerplay, but oh well.
In regards to the batting mechanics, you'll find many things are possible, but the focus is on actual skill being the main factor. The batsmen can play a wider than ever range of shots. You may be able to make the batsman sidestep and play a highly unorthodox shot, but the margin for error will be small and the timing of the shot will be quite different to a safer shot. Plus, I'm sure the front/back play has been mentioned. You can play with automatic footwork, but you will be rewarded with more accurate placement for choosing the most appropriate stance.
The bowling mechanics are intuitive. Accuracy is important, but it's not just about landing the same delivery six times on a coaster. Producing a good change-up affects how the batsman must time the ball and could induce the chance you couldn't get because you were getting a bit predictable. It's a little bit about dealing combinations to a batsman and holding onto your ace until it's most effective. Due to the double-tap nature of the controls you can also use this to disguise the ball you're really going to bowl.
If your batsman is playing straight and mostly defending, the best chance of a catch will be to the keeper. Cross batted shots also tend to behave and a top edge doesn't just veer off to the slips. The slips come into play for attacking off side shots.
You can actually play quite a few streaky shots without creating a genuine chance. Yes, the edge sometimes goes racing away. It might sound frustrating, but it's a much more enjoyable bowling game as a result. There are reasons to go "ooh" and "ahh". You can actually enjoy the overs where you don't take a wicket, because you're in the contest.
The atmosphere at games I'm sure has been covered in review. Light in the game does vary, but not dynamically; the reason being that it just doesn't look as good. One thing you never get from screenshots is that the game has very slick animation and a lot of work has gone into the way the game looks in motion. There will be some shots or plays where you'll be dying to see the replay. The actual fields vary between the various grounds, as do things like smog or sunshine and of course there are plenty of ambient effects to keep you immersed. There is a considerable variety of music and different locales have their own tastes.