The points you make about Rogers is something I've noted, we all know he has talent but he's either brilliant or a liability. We seem to ignore his lack of pass completion and point the finger at Watkins for not scoring but for too many games they're both so ineffective they may as well not be on the pitch. In Watkins' defence he's largely relying on Rogers for the pass.
I think Emery always has 1 (or 2) players that he encourages to try things while accepting that a lot of the time it won't come off - maintaining a rigid defensive structure should allow coverage and the element of chaos is worth it in a system that otherwise aims for control.
This year it's Rogers, but previously it was Bailey.