I'd take Akira Toriyama's opinion over both of those any-day. It essentially means that the user is forcibly making themselves stronger as opposed to just getting stronger the normal way, which is heavily implied in the new material. Hmmm... although, once one becomes a Mastered Super Saiyan, they should presently be at their limits, and there isn't a way to bypass those limits without forcibly amplifying their normal Chi; hence the introduction of God Chi.
So I'd go with it still being a potential unlock of sorts.