Agile at scale is taking agile approaches to the next level with using agile to run business units and that can mean management giving up some control. It’s also about moving from fast with quality - you got speed down, now let’s get better quality.
Your current brainstorming techniques might be hindering new ideas. How can companies come up with creative, executable ideas? Through guided brainstorming sessions and variations including brainswarming and “note and vote”.