Mike Tomlin just got a long look at the newest Steelers, with all the draft picks and undrafted free agents gathering together for a three-day minicamp. But did you ever wonder what coaches look for in an orientation like this? The rookies don’t know the playbooks. No matter how much they’ve studied and worked out, they still don’t know. Tomlin told reporters what he notices when everyone is all together for the first time. To summarize, it’s a whole lot of “hows.” “I’m looking for a lot of things to be quite honest with you,” said the Steelers head coach. “How people take in information. How …