Orthodox insist on precise Christology and distinctions regarding the Trinity. The filioque muddies these waters and yes, whether you agree or not, reduces the status and role of the Holy Spirit.
Regardless, as our debate amply demonstrates, Roman Catholics and Orthodox do emphatically NOT agree that the filioque belongs in the Creed. The Orthodox position is that there are theological (and scriptural) reasons for not adopting the filioque.
So the statement in the original post that Roman Catholics and Orthodox agree on this point is simply wrong. It's not just a matter of breach of counciliarity. If you don't believe me, Google "Orthodox position on the filioque" and you will see.
I do grasp it; see the bible quote in Post #5. If distinct personalities are not displayed in that one sentence, I can’t help you.