Yea, looks intentional, maybe a counter hit indicator on some moves.@ 2:35, Dragunov's ff+3 now has a slow-mo effect when it connects.
I'm guessing this is just an added visual flourish like the camera cuts we saw in T6/TTT2 for some moves (like Feng's shoulder or Paul's death fist).
Edit: actually, I think this may be a thing with all homing moves. Really cool if so.