I think it's the heaviness I didn't like. I skied them in 16 - 20 inches at Targhee and they were certainly good, but I also skied the Rustlers in 15+ at Alta a month earlier (similar snow feel) and simply felt more afloat and control. (I ski intermediate in the powder though since I have limited experience).
The last sentence explains your preference. The Rustlers pivot much easier, and have a big sweet spot.