I agree. And, if you remember LeBeau's last season and Shazier's first year, since Shazier was injured, on passing downs, they were walking Polamalu down into the box as a $backer. It wasn't as effective as they liked, but they did it. They did it behind 2 DL and 2 DEs though, with 5 other DBs. I'm thinking they tweak that even more, keep Hargrave in with Heyward and Tuitt. You stack the OLBs outside of that and Shazier in the middle. Then, you walk a big safety down, still have your 2-CBs and 2-safeties.
So, that is more of your base, fine against the pass because you have 5-DBs and Shazier in coverage. Still strong against the run because they are basically running a 5-man line. It is because you have an ILB that runs a sub-4.4 that you can do this. Shazier provides coverage and run stopping. If you get a big safety that can cover and hit, then you have something. They can negate most offensive sets, including the 2-TE that has killed the Steelers in the past.
So Obi could be in play??