Interesting theory aron. I've always pondered why Jesus said he had to go up in order for the Holy Spirit to come down. The principle that either Jesus or the HS had to be at the throne of God would explain that.
I assume that in your view the Holy Spirit is still an uncreated being as most people think of angels as having been created.
Hebrews 9:14 refers to the Holy Spirit as eternal and there is other scripture that suggests the Holy Spirit is intimately involved in creation (Ps 104:30, Job 26:14, Job 33:4) and also after the earth was created, the Spirit of God was hovering over it (Gen 1:2).
I ascribe to John Bevere's view of the Holy Spirit as the person who "does all the stuff". The Logos comes forth from the Father and in turn directs the Spirit what to do. So Jesus is like the foreman of a factory who gets the blueprints from the Father who is the architect and speaks forth the orders and the Holy Spirit are the workers who carries out all the work.
http://books.google.com/books?id=3_u...%20god&f=false
Regarding the person of the Holy Spirit, in your view the Holy Spirit being the "Great Angel" would have feelings and a personality. This also seems to be confirmed by scripture that ascribes attributes of a person to the Spirit, for example he can be grieved (Eph 4:30), as opposed to some who view the HS as simply a force or influence that emanates from God.
Hebrews 1:14 also refers to angels and spirits interchangeably which would support your view. Perhaps the "Angel of God" references in scripture was just another way of referring to the Holy Spirit.