no one actually fixed matches, because that would need some level of player involvement ... the whole thing had to do with influencing the appointment of match officials (refs); ironically, in quite a few matches, decisions and results did not go in favour of the guilty teams ... the act of influence was nevertheless a crime, and was thus punished ...
the penalties weren't "changed" ... the initial penalties were not the final penalties, because the process requires the harshest punishment to be decreed first, an appeal to be then heard, and a final decision to lastly be doled out ...
and the penalties were a joke? Milan should have been relegated? what justice system are you basing this on?
and how do you assume that status quo would have been restored? Juve were consecutive league champions in 2006 ... now, after being relegated, they're struggling to consistently get to the Champions League spots, and can't afford to bring in star players even if those players desperately want to join them (e.g. Džeko) ... Milan weren't relegated, but they haven't been able to sign any big names till this season; and actually, they've only done so because Galliani has suddenly become the master of the discount and free aisles ...