Nice shots!
If I can make one recommendation it's that if you're ever in Hampshire visit Broadhalfpenny Down and try shooting the Brigands. The standard of cricket isn't great to be honest but it's a beautiful place to take cricket photos. I've only been a couple of times but will definitely go again this Summer.
As for settings I tend to go for as high a shutter speed as I can to freeze the action and I tend to try and include the ball where I can, it just seems to bring a lot of the shots alive. Normally as you're a good distance from the action you can afford a relatively shallow depth of field. I think all these are F5.6 or 6.3 (Fastest I can go). It's *really* worthwhile to move around the field and use different angles, obviously being careful not to move behind the bowler's arm.
But good luck, for such a supposedly dull sport it offers a lot of challenges, especially as mentioned above those whites!!!
I should mention that my longest lens is the 70-300 so I don't quite have the reach that I would like. At least another 100 would help and it's a small ground there!