The helmet may very well be the wave of the future, but if so there will have to be some adjustments to uniform regulations. Consider me a stickler, but if the uniform requirements say I have to wear a logo hat, that is what I wear, even for league single umpire games where no one is there to enforce the regulation.
Sure, you can stuff a hat under the helmet, especially one of those old beanies, if you can still find them with the required logo.
But, I can see it now... if you want to wear a helmet, you'll have to by one in solid navy blue with the sanctioning body's logo painted on the front.
Uh oh... I hope I didn't give them an idea!
Personally, I'm satisfied with my lightweight mask, but maybe it's just that I've not tried a helmet and am in a "don't know what I'm missing" situation.