Two things you can do while staying in comfort mode: pull that left
paddle shifter at least a couple of times to raise RPM, or push the go pedal down far enough to tell the trans that you want power now; in a straight line you can even engage the kickdown switch (I say "straight line" because I do not recommend giving that much gas while maneuvering): that is the real message sender. For example, on my last road trip, I was cruising at 89 MPH, pulled out to pass and pushed the gas all the way: instantly the trans downshifted from 8th gear to 4th gear: and this was with engine set to Eco (in Custom mode): before I could collect myself, I was doing 130 MPH.