I am good with this move. GB offense has seen success for the past 30+ years, regardless who is at HC. Yes, they also had two HOFers at the most vital positions. But at the same time, that offense, no matter who was running the show, always seemed to be disciplined, took advantage of the receivers and running back's skills, the OL always created holes, etc. These are things we never associated with the Bears.
With that being said, if Getsy can bring the GB playbook with him, then I am all for this move.
And some of you are concerned about his inexperience. Screw that, you gotta start somewhere and get your foot in the door. This could be a bad move or a good move. We don't know yet. The most important thing is that the new guys in charge (Poles, Eberflus) take action the following season (if needed) to correct it. No more stringing along guys that aren't working (see John Shoop... or Nagy.)