speed has nothing to do with them getting sand in their eyes.
It would've been the early reveal of sharingan genjutsu
True Gaara was being taxed just using his armour. To maintain a sand screen all around and channel chakra into it would cost him way too much chakra. And he'd also need the sand and chakra control of the level to pull of such a feat. Sasuke would've waited him out and then solo'd him.
-Madara has several long range attacks and susanoo. Why are you comparing a Uchiha leader with year of experience in a warring period to two chuunins fighting in a closed arena? On the first case, Tsunade doesn't even utilize sand nor can she spread it in the air.
And Tsunade could have easily defeated Madara if only she had sand in her pocket.
Too bad Hinata didn' t have sand in her pocket when Toneri came.
Gaara still doesn' t know the trick, because he should have easily defeated Madara by throwing sand in his eyes.
Do you remember that Sasuke and Lee can move faster than Gaara' s sand?
And now that you remember that, do you still think this would work against Lee or Sasuke?
Unfortunately, you're right. Gaara main tactic is to grab you and then crush you. Only later did he use his sand more deceptively.
His sand wouldn't have had to if he didn't clump it and focus on grabbing him. He could have used the sand as a barrier of loose sand to blind him. Sasuke would end up running into a cloud of sand that gets in his eyes.
