In all honesty, I think people just don't want to think outside of the box. Specs Shaymin maybe less viable, (still good with the chance of Sp.D drops but whatevs) but how about Sub Seed? That thing messes with Chansey so bad. Shaymin gets a huge percentage of hp back at the end of each turn coupled with Leftovers. Shit, even an offensive variant with Leech Seed could work. And, don't compare this to "adapting" to something retarded like Rayquaza. I don't know, people just don't seem to like... trying in their team building.