Depth, to me, means where the team is going to be 2-4 years from now than it is in week 2. Jasper Brinkley, Daryl Washington, and Reggie Walker are adequate depth if you add a 5-7 round pick, because ILBs are plentiful in free agency every year and veterans are largely plug-and-play.
But this is like saying that we added Frostee Rucker because we wanted to help our run defense. Rucker will be fortunate to see 20% of the total defensive snaps. If Washington isn't suspended, Minter would be lucky to see that many snaps this year.
But we have no depth going forward at ILB beyond 2013 because Walker's scheduled to be an unrestricted free agent. I like Walker. Depth is depth. I don't know if Minter will be able to push Brinkley for his starting job this year, but he should be able to next year.
If anything, I bet that Minter is going to be stronger in coverage and might start as a nickel linebacker over Brinkley. Even this year.