It seems that these days, no more than a handful of games pass by without a major controversy affecting the final result of a match.
Sometimes there's nothing that can be done about these incidents. For example, there's little that can done about a debatable red card decision.
It's the referee's job to make those decisions, and reviewing those decisions in-game via replay would eat up too much time and ruin the flow of the game.
Often, however, there are small changes to the game that could be implemented to significantly reduce controversy. Usually in these cases, bureaucratic inefficiency in FIFA, UEFA or another football governing body is the reason why progress has not been made.
We're going to go through these positive changes, detailing what aspect of the game they would improve, and what the obstacles and possible drawbacks might be.
Hopefully somebody from FIFA will be reading along.