I guess the arguments about him having flame control are legit, but I don't buy into them for one reason. When Itachi used Amateratsu he also put out the flames and showed the ability to adjust them(first one versus Sasuke and the the third against Nagato by using a smaller version to destroy the crow.)
Tsukyomi requires extreme chakra control, which Sasuke has been said several times to not be the best at and even shown. Controlling time and space, the target's perception of reality, is way outta his league. We never saw him use Genjutsu in part 1, even though his dojutsu is linked with it. In part 2 when he did use it, his genjutsu was very weak: Against Bee, Against Cee, Against Danzo.
Obito said it best, Sasuke isn't the most proficient genjutsu user, but he knows how to use it to better his situation.