The simulators on our rig have 5 holes that are smaller than the ones in the steel wheel. I can see that air flow would be restricted but at the same time, not sure how much, if any, air flow is needed through the holes in the first place.
Ours is the Workhorse chassis and i have had problems with sticking calipers. I tend to believe, like you, that the simulators weren't the cause. So yes, the pretty chrome simulators are still on the motorhome.