Although I see your point, they cant do anything more than they already do. I ski at meadows and know that area well, the slide started well above Superbowl which is already a very exposed area that is considered "in bounds" but involves a hour+ hike on the occasion they do open it. If you check out the blog post on the avy (http://www.skihood.com/Community-and-News/Meadows-Blog/Posts/2010/01/Anatomy-of-an-Avalanche)
you can see some really good perspective shots from near the top of Superbowl and see what canyon it went into. In that picture, looking down into Clark and Heather canyons from Superbowl, the entrance to Heather is on top of the big ridge to the right of where the arrow is pointing to the bottom of the canyon. The M1 Howitzer they use for avy control is halfway down that ridge, nowhere close to the slide zone and in fact almost too small to see in that picture. All that to say, the slide started at 1,650 ft above where that picture was taken, which is somewhere close to the highest point considered "in bounds" for the resort. Unfortunately, there's nothing anyone could have done to prevent it. Fortunately, no one was in it.