Edit (apologies for bumping this since its about 3 weeks old. I just beat this with CSZ and was looking around to see if the audio missing was just that I had a messed up copy of the game. I didn't pay attention to the timestamp before ranting here).
This most definitely bugged me and it comes across as unfinished.
CSZ is another in the line of half-finished last minute additions to MK games (see Meat, Blaze, Mokap, etc).
He really should have been SZ's unlockable alt instead of a separate character (being what people said above he's just Cyrax, SZ, and Kung Lao hashed together).
Another thing I don't like about him is that he seems to be a tad slow compared to most characters as far as his attacks go, but he's SUPER fast dashing. So much so that it threw me off completely my first round w/ Shao Kahn.
I agree that if they couldn't have put the full effort into a full ending, better fatalities (because both are really awful. I can't believe someone here actually said they liked them. I hope they haven't seen Baraka's "Lets Go for a Spin" fatality, which is the best in the game IMO) and a real separate moveset, then I would have rather he been DLC and not included at all.
Its a waste of a character and a waste of development effort (no matter how much or little) that could have went into polishing other things on the game like tweaking some of Shao Kahn's glitches.