I have a manual, but haven't noticed any difference in the ECO light. I believe it has always gone off shortly before coming to a stop.
I posted this elsewhere, but I had a 6+mpg increase over my average (43 to 49) this first tank after my ECM reflash. However, there were lots of variables: fresh oil change and manual trans fluid the week before, warmer air temps, longer drives, and someone mentioned summer fuel blend is back, as well. So it could totally be a fluke, I'm waiting to see. I haven't heard anyone else mention improved/changed MPG though.
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View my fuel log 2015 Mirage ES 1.2 manual: 44.1 mpg (US) ... 18.7 km/L ... 5.3 L/100 km ... 52.9 mpg (Imp)