I'm seeing a VERY big change with my exercise minutes (green circle). Note, I am not actually starting any workouts, all of my activity is being passively picked up by the watch. To give you a typical example, on watchOS 1, I might get seven minutes of implied activity by walking around. With 2.0, yesterday alone was 35 minutes, the day before was 40 minutes, and after this morning's grueling workout of walking through a parking lot to drop off my daugther, I've got 8 minutes logged.
Not saying it's good or bad, this may be the result of some tweaking, as I felt version 1 was too strict about which minutes it would count. I suspect it will swing back the other way as it gets tuned a bit.
Anyone else seeing this?