Creed was declared a heretic and kicked out of SA a LONG time ago. I forget when it happened.
And yes, we know that Creed wasn't "leading" the army. That's simply a convenience for discussion purposes. He was coordinating it at the request of Abbigail. But, like I said, if Abbigail had done it herself, or appointed another SA noble to do it, then the church would never have gotten involved. It's not stagnation, it's more like opposing anything that has Creed involved in it. After all, he's a heretic, so anything he wants done is, most likely, worth opposing.