I agree, but only because it's random chance. Guilty Gear has it's fair share of random elements in it's character mechanics, but it still seems out of place. I'd be much happier with it if it was an invisible stat that gained with each clash, or if it only activated when high level attacks clashed.
I like the fact that it adds a sudden moment where the characters are separated spatially, and rushing back in aggressively is the best way to take advantage of it. My favorite part of Guilty Gear is how it has several mechanics that reward playing aggressively, and this is yet another one. I'm skeptical right now, but my mind might change once I get hands on experience with it.