lol Its tough in the playoffs but its definately not that hard to win the championship. You have to remember to take what the cpu gives you on offense. Its not that hard. The first time i got to the playoffs i got beat. I hadnt played it in years so i was kind of rusty. Its NOT impossible to go undefeated in the playoffs or the season for that matter.
The hidden buffs and nerfs were the only way they could up the difficulty of the game back then. I can easily win the Super Bowl with a good team. Hell, I almost won the Super Bowl with Seattle but half my team was injured.
Only thing that ever does keep me from winning is injuries to too many key players. Losing 10 to 7 because you have nothing left to even pass for an offense sucks. I hardly see the opposing teams coming in with back up QB, RB and WR all at the same time.