yes, slim pants are required to ski unique features.
and yeah thats definitely a bummer. My mountain's parks (7 Springs, PA) are largely funded by Forum, well at least the Streets urban park was, and a lot of features are incredibly annoying and sometimes impossible to ski.
you CAN hit those concrete ledges, but tricks are just stupid on them being that they don't slide. And that up rail next to the tunnel box was basically unhittable when the bike rack was under it, except for the crazy kids like Alex Taylor who were 50-50ing up it.