I still think that the French midfield will be too much for Ukraine. With Ribery's current form I believe it should be too much for Ukraine to handle. Couple this with a resurgent Nasri and Valbuena and the attacking trio should be more than Ukraine can handle. The key will hinge around Pogba and Cabaye, if they can slow down any Ukrainian counter attacks while bringing an added offensive punch - see Cabaye's weekend goal for Newcastle - then I think that will be too much for Ukraine. However, let us not forget that Ukraine drew twice with England during the qualifications and could have gone through directly to Brazil (imagine if it were an England v France playoff...wow). Ukraine will not be afraid of where they are and will give Les Bleus all they can handle. Prediction - France go through 3-1 on aggregate. Win 2-0 away and draw 1-1 at home.
As for the other match ups.