I mean maybe.
People forget but Cundiff wasn't very good for 2011 anyway (even before the playoffs). Regular season FG% dropped from near 90% in 2010 (when he was an All-Pro) to nearly 76% in 2011.
He was 1/6 from 50+ (never had a strong leg anyway) and he missed two kicks inside of 40 yards. He was 18/27 from 30+ yards.
Now they did sign Cundiff to a five year extension (though with very little gtd money) prior to the 2011 season, but I think there's a good chance they brought in at least some competition for him regardless.
Plus, lets be fair... I'm not sure the Ravens even ever envisioned Tucker being what he is. He was signed as an UDFA in late May, and if the Ravens were a lot more serious about competition for Cundiff, they probably would have drafted somebody. Note that there were four kickers drafted that year, including some pretty good one's (Zuerlein, Walsh, Bullock).