The abilities seem pretty simple to me, so I imagine a slight rewording could clear this up.
I think the difficulty is that what you want the abilities to do is not what people expect them to do. I would never in a million years have thought that someone could roll his dice on my turn before even discussing assistance. It defies my expectation of it being "my" turn.
Wording can make your expectations more clear, but it doesn't change the cognitive dissonance for me. I understand your vision of the rule clearly now, but I still think it clutters the design.