Thank you for both posts.
The "through the Son" formula does not alter the fact that the Orthodox, -- at least today, -- deny any relation between the Son and the Holy Ghost. This is the weakness Aquinas leverages in his discourse: if the Son is not related to the Ghost, do we still have monotheism? and if He is, then what is it if not begetting?
So, I used to see unity in the "through the Son" language, but these days my Orthodox friends convinced me that the schism is deeper.
I'll do some Orthodox bumps after the Orthodox lent is over.
Christ is risen! ;)