Theologians have no authority associated with that title other than their credentials to teach in a Catholic school or university and many aren't even credentialed to teach in a Catholic University.
Like Hans Dung, though, such people can have their official credentials revoked or even be excommunicated and the media will still refer to them as an authority when it suits the media agenda.
In the "publish or parish" rat race, disagreeing with the Church ensures publication.
Removed from what ? He has no authority anywhere but in the media and those who swallow what the media dishes out.
Reprimanded, perhaps; disciplined, perhaps; a lot depends on how many other numb-skull ideas he's spewed out and how publicly he spewed them. One thing for sure, he needs tested for a mental disorder if he can actually read Aquinas and come to the conclusion that Aquinas thought queers were normal little butterflies.
And no, it doesn't seem like tradition is open to debate and interpretation. Of course, those who prefer their Rorschach Test substitute for Christianity to the Truth of Christ are free to draw whatever conclusion they see in the media ink blots.
I understand...church discipline is lacking these days.