Oh dear god, a traverse! On a snowboard? NO WAY?!!!
Way. It's actually done everyday. I ride with snowboarders that traverse through the worst Whistler Blackcomb has to offer, both in and out of bounds. None of them have ever had a problem. I can assure you that any traverse Alta has to offer can be conquered by a vast number of snowboarders. And worst comes to worst, they can walk, which is probably a better, faster option anyways.
Now that I've completely killed your traverse argument, let's get your head out of your ass and make you face the facts: Snowboarding is only banned at certain resorts, such as Alta and Taos, because of shortsighted head office people who can't comprehend it. High level staff at resorts as diverse as Mammoth, Whistler, Tremblant, Chamonix, and thousands of others have understood a couple of important things that old school, stuffy, 'skier only' resorts haven't yet: it's possible to have skiers and snowboarders share terrain,  and allowing snowboarding means more profits. Simple, isn't it?
I'd rather ride with a hundred thousand snowboarders than the fogeys who run Alta and similar minded resorts anyday.
TMC WUUUUUUUUUUUUUT
WE KILL YOU
SKIER: How would you describe your style?
PJ Cliche: Total skate influence. Even doh dis is on concrete, an you are face sideways, an it has sweet fuck all to do with ski, skate 'as play a huge role wit my steeze.