I think perhaps limited replay for questionable goals might be useful (the French team would be watching from home if this were the case), and it wouldn't interrupt the flow of the game much. I don't think we'd have a situation like we do with American football where the ref spends five minutes looking at monitor--most of the blown calls are really easy to spot.

Bookings really shouldn't be reviewed, at least during the match. Perhaps FIFA could institute a review process post-match, however, to reinstate players that would be lost due a red card or multiple yellows.