Singer's a better overall director than Story, yes, but he sucks at action scenes and CGI. He doesn't have the vision of great action directors like Cameron or Spielberg. Story isn't on the level with those two, but as far as action scenes he's better than Singer.
Singer's vision for Superman's flight was bland and unimaginitive. It really was no different than the Reeve's films. Perhaps some of that was to match style, but it came off looking boring and drab. The CGI was plain awful.
Superman was basically shown flying in one direction with little motion or direction change. In that short little 1 min 30 second FF trailer, you see the Torch and surfer covering all sorts of ground.
I'm not sure who did the effects on SR, probably ILM. Weta Digital is doing FF2, and you can tell the difference in creativity.