WI: Monothelitism after Byzantine victory at Yarmouk?

Monothelitism was the attempt by Emperor Heraclius to bridge the gap between the Chalcedonian rites followed by the people of Anatolia, the Balkans, Italy and Africa and the Miaphysite/Monophysite (I forget which one is the proper name) rites followed by the peoples of Armenia, the Levant and Egypt. To sum it up, it was vehemently rejected by the Pope and didn't even satisfy all the Miaphysites/Monophysites. Then, after Yarmouk, when Armenia, Egypt and the Levant were lost to the Muslim Arabs, Heraclius' successors saw no need for compromise and it was deemed heretical in 681 at the Third Council of Constantinople.

Basically, if Yarmouk spelled the death knell not just for Byzantine power in the east but Monothelitism as well, would Monothelitism have more credibility in the aftermath of a Byzantine victory at Yarmouk? Turning back a hostile invasion in a few years under Monothelitism compared to taking decades to push out the Persians under Chalcedonianism - that could be a selling point, at least in the East. Italy might break away or lead to an earlier Great Schism.

Thoughts?
 
I think we should really distinguish monoenergism and monothelism as definied by the Echtesis there.
What was the official doctrine in the 630's was mononenergism (even if called Monothelism), as articulated in the 610's. This one could be salvaged, even if it knew some drawbacks by then.

Pulling monothelism would have been a bad idea, eventually. It collided too much with eastern churches but as well with Orthodox churches as well (and of course, Latin churches, but these weren't really considered by Constantinople).

All the goodwill accumulated by the promotion of monoenergism would have vanished as it did IOTL.
Of course, monoenergism was still fought against, but it was more a matter of local issues as all Patricarchates agreed on the doctrine.

But even with a victory against Arabs (I should point that a victory at Yarmuk for Byzantines would have gave little prestige gains : for Byzzies few troops were involved, and it was a marginal fight. Battles in Anatolia had much more importance theologically) wouldn't make the Echtesis (of 638) universally accepted.
 
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