My solution wasn't meant for track day events. It was merely a suggestion for a novice driver NOT to start hard downshift coming into corners as a method of slowing a vehicle. Especially if you're coming into it at excessive speeds. That can be just as reckless as pulling the emergency brake.
Also, my comment about depressing the clutch, or throwing it into neutral had nothing at all to do with stopping, but everything to do with regaining control in the event of a loss of lateral traction while attempting to stop. Someone above mentioned how coasting through a corner in neutral presented control issues...when the exact opposite is true. I would however use brakes coming into a corner over engine braking in most circumstances. Especially if I was a novice driver and unfamiliar with the roadway. At least if you start to slide under hard braking, you'll do so in a straight line.....a situation which is immediately corrected the instant you let off of the brakes. From there you apply the brakes again as necessary. If you are unable to maintain control under braking, then your loss of it lies with the speeds in which you are travelling through said corner in the first place.
Remember…rear braking only accounts for about 30-35% of a vehicles stopping power. All of the momentum is thrown forward the moment you decelerate. Your front brakes handle most of the load…which isn’t the case when engine braking is put into play.
Bottom line….engine brakes prior to a corner…sure. It’s a great method for saving your brakes and taking a lot of steam out of the proverbial sails, so to speak. I haven’t an issue with engine braking being used as a method of deceleration as long as speeds and road conditions permit, but I wouldn’t rely on it as a primary method of halting a vehicle down at when travelling through a corner. Not without knowing the exact road conditions, limits of your tires/chassis and where you’ll end up as far as gear ratio and how much engine drag will be presented after your down shift.