Also one thing to note...Phil Merling, Randy Starks and Reggie Torbor are making probably the biggest transitions among the major front seven players.
Starks played DT strictly in a 4-3 setup and is trying to get use to a 3-4 DE position. Merling played DE in a strictly 4-3 setup and is trying to get use to the 3-4 DE position same as Starks. Reggie Torbor was always a 4-3 OLB and now he's trying to be a 3-4 ILB.
When you think about it, Matt Roth played in both Nick Saban's 3-4 and Dom Capers' 3-4, Vonnie Holliday the same, Jason Ferguson is VERY experienced in this particular 3-4, Joey Porter is well experienced, Charlie Anderson played the 3-4 in college and then his first year or two in the pros under Dom Capers with the Texans, Akin Ayodele played this defense in Dallas, and Kendall Langford played the 3-4 in college.
So, if you're noticing that Torbor, Merling and Starks seem to be 'forgotten men'...they had the most to learn.