This is THE BUSIEST time for production companies and film skiers... One of the big reasons some athletes don't get the most banger segments are because of comps. For many athletes, after X-Games (or now this year, dew tour northstar) marks the end of comp season, and beginning of film season. It's game on time to get the shots you need for your segments. Tanner for instance is busting his ass to get the segment he wants (and ultimately what the majority of people are going to want, and be drooling over come fall)...So he could either be in sweden and norway hitting more park jumps (and obviously that would be ridiculously sick too, and could probably make one of the best/unique videos of them all), or spending the true time needed to do work and get epic shots up in BC and AK. The length of JOSS, and the timing just isn't the best for the guys building segments in the backcountry, especially march when many of the big mountain lines come into prime, and AK gets good.
Concluding this rant: NO ONE should be bummed about Tanner or Sammy not being at JOSS... If you think about it: Whether they are at JOSS or not, they are still going to be filming during that time for your viewing pleasure later in the year. I'd personally rather see how much more they are progressing in the BC, which again, this time is absolutely crucial for that...