Actually, with the HCH, the car maintains the Brake pressure and Power steering pressure if you turn it off while coasting during a driving session, as long as you return the key to the "run" position.

I do this all the time in my manual tranny 2004 HCH, but I CAREFULLY select the when and the situation.

Like after entering my gated housing community, going about 20 miles per hour or less and coasting up to my garage. Or when I'm on a low usage road at 6:30 in the morning with a 30 MPH speed limit and I crank up to 35 then turn off the car and coast until I hit about 20 MPH and then restart the car. Or when I turn down the street to my kids' school and coast into the empty parking lot at 6:30 in the morning. Or when I see that I'm coming up to a red light a couple of long blocks away and there are few or no cars between me and the light, and no one zooming up behind me. Or one hill I sometimes come down near my home where I can coast for almost a mile sometimes.

NOTE: I usually only do it when I'm going to be restarting the engine at LOW SPEEDS or stopped.

But like I said, with the HCH, it maintains brake and power steering pressure, so there are no issues with failed brakes or "hard to steer" torque. And this tactic is only helpful if you have a good battery charge, because coasting with the car off and out of gear is not charging the battery.