It depends, really. Some Astrals are really useless, while others are quite usable in real matches. Hakumen's counter Astral could counter anything other than projectiles (yes, it could even counter grabs and command grabs), but you had to pull a 720+D which was a big fuck you for a character that's full of slow basic moves.
They made a few changes to Astrals in CS: all characters have them (no need to unlock), you can do it in your winning round (ie, round 2 of possible 3 if you'll win the match); you need to have one barrier burst at least to do it and your character portrait glows, so you know when it's doable. Plus, Hakumen's input is changed to "Hold down -> press up + D", which means no cross-ups and you can
it much easier. Oh and it counters Tager's fucking grabs.