Is it just another God of the gaps argument? Or is it the logical conclusion of a universe which was intentionally created?It's simply another God of the gaps argument. As there have been thousands.
God's have been inserted in the unexplained since they were invented. I'm guessing you don't believe in Zeus, Thor, Krishna, Budha, etc.etc.
Even more, the overwhelming majority of the times they tried, the assertion has been proven false. Poseidon doesn't cause storms. Misfortune is not the fault of Loki. Even,even, more than that even within Christianity the understanding of the natural world has caused the Bible to be reinterpreted less and less literally. It's the same for all religions.
But I'm sure you inserting God as the reason for the Big Bang is completely different.