Yes. And I do just that. I mix why isolate with free EAA and some peptopro pro.
What the study doesn't say is that the insulin response is as a result of an increase in blood sugar (created by the immediate conversion of some of those free amino acids from wph). Therefore post workout carbs in your share aren't necessary where using hydrolysed whey protein, bcaas, eaa or just free form aminos) and if cutting carbs post workout, are a terrible idea.