Apparently Zach will not be a 3 down backer, per FBG Training Camp Update. With the what looks to be a high powered Dallas offense, many teams will probably be playing catchup, giving Zach even less playing time.
I'm not necessarily buying this. Bradie James, helmet communicator or not, will not be playing on passing downs. Kevin Burnett has the other communicator and he's the unquestioned nickel/dime backer. The big question for me is whether Anthony Henry continues to get snaps as a nickel LB. Much of that depends on just how many of the stud corners the Cowboys may have end up eligible and able to play. If Jones, Newman and Jenkins are all ready to play, Henry and Hamlin can help hide Roy Williams in a 4-1-6 dime/big nickel package. If Thomas sits on every passing down, his value takes a sizable hit (ignoring the concussion concerns). However, Matt Wilhelm in a similar role, pushed 90 solos last year and I still believe Thomas is a better player with a similar supporting cast. I still think Thomas can be a solid LB2 with upside. Should be interesting to see the Cowboys preseason games.