So... I feel like Minato was less powerful than he should've been. Or rather, less fast. On his own, he was renowned as the fastest shinobi ever. Even without the Flying Thunder God, he was cited as having immense natural speed with instantaneous reflexes (cited from this site). So by this added with his FTG, he was like lightning. Then we add in his Nine-Tails Chakra mode. With Naruto, the added chakra of half of Kurama made him fast enough to keep up with the Fourth Raikage.
Minato was faster than the Fourth Raikage BY HIMSELF.
So shouldn't his chakra cloak give him such insane speed that no one could keep up, not even Obito or Madara? I mean, come one. If it gave Naruto such a huge boost, why not Minato?