I do hope you all realize this is Super Vergil. Super variants of DMC4 characters always use their unique gameplay abilities as if they were maximum (Dante unlimited royal gauge, chaos gauge, DT)(Nero with unlimited DT and Exceed). What you saw in today's gameplay video is Vergil with unlimited Devil Trigger and all of his special moves are powered as they would be with maximum "Concentration".
Look no further than RapidSlash, there is no way they would allow such Crowd control under normal circumstances, I expect a much more normal one at lower concentration. His DT in this gameplay video doesn't decrease, that one screen clearing move in the trailer was confirmed to only be usable at maximum concentration (the blue gauge above his health) whereas both uses in this gameplay were at about 2/3rds and they didn't even cost all concentration. The changing concentration gauge in the gameplay video was purely cosmetic.
The real Vergil will definitely be more balanced.
Yes that is Super Vergil but he did not have his moves as if he had max Concentration all the time. The guy was building and losing gauge all the time in fact. He didn't even have full Concentration when he performed the super move.