I think audibles is a little overrated. I've said this before, the guys I watch Steeler games with and I used to laugh when you'd see Ben going through the audible motions. He'd be pointing, guys are shifting, announcers saying he's audibling, "BLUE 92" and all that stuff...and...not much. You'd be waiting for this great play and pfft. I think we confuse audibiling sometimes with Ben's great improvisational skills.
It reminds me of another thing I have argued is overrated...halftime adjustments. I had to laugh...NFL films just released something with Peyton Manning about the myth of halftime adjustments. You can probably find it on Youtube.
The last thing is how can you be so sure it will NOT be fair? I know Tomlin is the main variable here, but at the same time I think previously they had a type of QB in mind. That was misguided as we know now, but still. But teams do this all the time. They have a certain idea of what they want out of an OLB or whatever, and they get players that fit what they want. The whole Canada offense experiment blew up in their faces, so we'll see. I gotta think they learned something.