You'll need to take the complaints to the device manufacturer because they broke the game with their specific version of the Android OS. Even in the case of Nexus 6, there are still hardware specific parts involved that can severly affect performance.
Same problem here. It started with the Lollipop upgrade, was fixed with (I believe) the introduction of the superhero update, ran fine up through the Terwilliger event, then rebroke when the event was removed.
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