The hoods on my Helly Hansen Seven J and my Marmot Precip have a drawstring adjustment around the face opening and a velcro adjustment behind the hood that draws the hood back and out of your peripherals.

Sometimes on dry mornings I'll wear a hoody, whose hood REALLY interferes with my field of view. Problem solver in that case is a ball cap. The bill keeps the sides of the hood from infringing.

But if you like helmet covers, more power to ya.