An Orthodox solution to the logical problem of the doctrine of the trinity?

I have mentioned before in this blog about how some Orthodox theologians seem to believe that the one true God is simply the Father. In that regard I referenced Fr John Behr, but I have read a similar view from Fr Thomas Hopko. Both of them, however, maintain that the Son and Spirit may also be referred to as God - a point that I did not feel that either of them particularly clarified the reasons for. I have also discussed in a previous post the significance of the definite article and lack thereof (theos vs ho theos) in the wording of 1st John Chapter 1 vs 1. In this lecture which I came across this morning, by another Orthodox theologian (Dr Beau Branson) both of these points are brought together, and the position elucidated by Behr and Hopko (both of whom are mentioned in the lecture) is made even more explicit: The one true God is NOT the Trinity but simply the Father. There are three divine Persons - Father, Son and Spirit - with the latter two deriving their divinity from the former (something else I have discussed previously on this blog). The Son and Spirit are called God but (according to Branson) not in the same sense (the 'definite article' sense) as the Father is. In other words, neither the Son or the Spirit is "the One God". That title is reserved strictly for the Father. (This distinction between the ways in which the term 'God' is used to reference the Father and the way it can be used to denote the other two Persons is, admittedly, still rather unclear to me. It seems to me that it would be better, in modern English, to simply use the adjective 'divine' to describe the Son and the Spirit while reserving the title of 'God' for the Father alone).
The view of the doctrine of the trinity described in this post is, apparently, considered orthodox (both with and without a capital 'O') in the Eastern Church and is, according to Branson, the view of all the Church fathers prior to Augustine.
If this is correct (and I believe it is) then the problem of the coherence (or perceived lack of it) of the doctrine of the trinity is resolved. In its Orthodox formulation, as outlined by the likes of Behr, Hopko and now Branson (amongst others who Branson refers to in the lecture I have linked to), it seems the doctrine is not incoherent at all and may be believed in without compromising ones intellectual integrity.

Update: See my next post, which is a reflection on this one.