Well, I guess it depends on what you call success. To me, if we win 11 or more games in a season I call that a successful year. "Not AS" successful as a SB appearance of course, but more successful than the 8-8 Garrett was known for.
Of course 50/50 isn't possible anymore with a 17 game schedule, but 50/50 for any team on the old 16 game schedule stunk IMO.
Nevertheless, you have to play some pretty decent ball to win 11 games or better. 11 wins are not a failure in my book, just not as fun as a SB.