In my opinion, mistake to leave out Baines in favour of Warnock. Baines is a better defender, a better crosser of the ball and a threat at free kicks. Warnock can be a little careless sometimes.
Another mistake to leave out Walcott in favour of SWP. Walcott can be hot or cold, but when he's hot, he's electrifying. SWP is not a very smart player, he frequently makes the wrong decision.
Baines was poor in his distribution and did not show much going forward in the friendly and made one bad mistake tracking back that resulted in the goal. He played himself out.
One of the reason I read is, Walcott did not do what Capello wanted him to do to stay out wide and take defenders on the outside instead of coming inside. As you know Capello is very commanding when comes to discipline.
SWP is very intriguing to watch. He is a messy dribbler, he will use his foot, shin, knee, thigh and whatever to get through his defenders, very untidy but nevertheless he did. His performance for England is good, so I think he deserve to be on the plane.
Carrick is poor in the friendly. But then when capello mentioned after the Japan game that the first half is too slow and he is upset that the passing is sideway and not forward. That's when I knew Huddlestone is going to be left out, though I must say Huddlestone is better at possesion and passing compare to Carrick.
Parker don't stand a chance. He is too British. Tough tackling workhorse, more suitable to Premier league, but not International game. So too is Bent, relying on hoof up ball then anything. You can see he doesn't have the confidence to take on defender, even on one to one case.
Though Adam Johnson impresses in the few minutes, he probably miss out through lack of experience at this stage.
