I think it's a really bad idea when you take a term that's really specific and already defines coordination that is unethical in the word "collusion" and then take it to a broader word and have to possibly make a list of what that means and what it excludes.
I think we're really muddying the waters and casting a net that's far too large to solve a problem that maybe is not.... I think a targeted approach is always best. From a legal standpoint, I think it's better when we have more concise language rather than getting into definitions.