"It is summarized by St. Greogry Palamas when he says that "as regards His existence, the Spirit proceeds from the Father.""
Which is pretty much exactly the Orthodox understanding of what the phrase "who proceeds from the Father" means, and why we cannot add the phrase "and the Son" in that context.
And there is no need to add anything. However, St. Gregory Palams, leading to that finishng statement, described the procession of the Spirit from the Father and from the Son in a way that reflects Catholic theology. So, there is no conflict in the filioque itself, save that it is incomplete and therefore cannot fully express the ultimate truth we know, namely that "as regards His existence, the Spirit proceeds form the Father" Who is the source and cause of everything, including Divinity.