I do also agree with this, the way the omnics looked, the way they behaved, it all looked like Talon more than the Kishin.
Because think about it, you can just tell by how the omnics were designed and how they act that they were clearly just doing a hit-and-run attack on the city. They were equipped with very few weapons (powerful weapons non the less) And they were all super small and fast, also. They never go directly for D.VA unless they have to. I think that they went for her towards the end of the fight, simply because they could see that the mission was failing, so at the very least they could take out one of the MEKA pilots.
Is this a crazy stupidly long theory on a simple suject? Sure, but I was bored and felt like writing it, have a nice day!