I'll jump in with my experience here. On my base 2018, I don't think there's a way to disable the ECO light on the dashboard while in Drive. But there is a big difference in shift points and speed by moving the shifter to "sport". I hate the slow lazy shifts at 2k RPM when in D, so I always bump the shifter to sport and then upshift to 6th. This way it'll run through all the gears needed, but will actually downshift on inclines and hold gears longer while accelerating. Once at cruising speed in overdrive, it makes no difference at all, so the only change is under load.
My wife hates the snappy shifts in sport mode and has complained about my driving habits as a result. Again, I'm in "6" so I'm not manually upshifting, just using the more aggressive map from sport mode.