If I understand your question, all the portal is is an administrative convenience for someone who wants to transfer to be able to get the news out so that other schools know it in an efficient manner, rather than having to rely on media or contact them directly. Said another way, the portal itself is (or should be) totally uncontroversial. If there is a controversy to be had, it's in the rules.
If that is not your question feel free to ask again. I am supportive of the ability of grad transfers to not have to sit a year out -- I think that was a fair change to empower student athletes who have accomplished what the primary purpose of college is.