...and then only half were. 😏

I jest. The Filioque was a complicated thing, and had been a source of disagreement between East and West going back to the sixth century. For my part, the desire to retain a single divine principium (emphasizing the 'oneness' of God)--though worthy en itself--is out of scope when one is speaking about the procession/spiration of one of the divine persons in particular (which addresses the 'threeness' by definition). Even the creeds ought to be subject to 'reformata, semper reformanda'--provided it's strictly according to scripture. ✌️