We know most every ability of Sasuke, but we do not know all the abilities of Minato.
1. I do not think he can figure out FTG so quickly, after all, its one movement, not a combination or series. Sasuke is vulnerable, even with sharingan. When he fought Bee, you could see Sasuke tracing his swords, but he forgot about Bee above him, and was almost owned. So a distraction involving FTG is possible.
2. Not sure about this, can ALL sharingan users use Izanagi?
3. Plausible. I don't think Minato was faster than the speed of light.
4. I think Minato is too quick for Amaterasu.
5. True, Sasuke was talented. But Minato was regarded as a genius.
6. An incomplete jutsu, is rasengan. And with Minato being the creator of the jutsu, who knows where he would've taken it.