I'm not sure that is revisionism so much as it is wishful thinking.
I think it is pretty clear the Fathers at the Seventh Ecumenical Council felt that Honorius was a monothelite.
"We affirm that in Christ there be two wills and two operations according to the reality of each nature, as also the Sixth Synod, held at Constantinople, taught, casting out Sergius, Honorius, Cyrus, Pyrrhus, Macarius, and those who agree with them, and all those who are unwilling to be reverent."
It was the Sixth Ecumenical Council that actually declared Honorius a heretic, but I don't have that one on my CD-ROM, unfortunately, so I can't supply any quotes from it.
Anyway, I would like to read what Carroll says in his book about Honorius.