I've been a lurking for a while but I made an account to reply to this.
Sure, I agree about dj.C being kinda weird, but the jump cancel, no, that can't be a waste of space.
Otherwise... I mean the question is simple: how would you tell someone where the jump is?
Take any Jin combo with his air BnB - j.C, j.2C, j.2C... sometimes you can get another j.C in there; there's even one with three j.2Cs and a j.D.
If I just listed those, how do you know where to jump? Sure, you could try it and figure it out on your own... but that defeats the point of notation.
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Anyway, it's perhaps no surprise the first post I make is about notation, as I have come with thoughts that the negative edge notation from other games is insufficient to describe Arakune combos. I'll be seeing what I can do about that in Arakune boards.
Hello.