Well, I hope they did take them out. That would be the only true evidence, so far, eliminating those glitches as possible links to SU's in all versions.
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from what i heard the walk on air in order realm was a glitch and it isn't in the PAL version. but i thought the WQ koffin was still there but was stated by the MK team as a glitch even they didnt know about. Maybe its an error maybe its not. its odd that a computer error would make up its own specific undesignated koffin letters and numbers like WQ 456 ya know? if anything i would expect the koins and numbers to dissappear until it came to the T row from scrolling so fast. If it is indeed a glitch im sure it will be utilized in the next krypt in MK7 if there is one, like they did with the macro error in MK1 and turned him into ermac....maybe WQ will appear and there will be a secret in order to access it...maybe it would stand for something like "Wake Quan" for wake up quan chi. so if you access it and open the koffin you get quan chi as a secret character. and you have to win 456 times in a row to get the key for it. ya know?

i'm not sure WQ is a "glitch", but it's definitely NOT a secret of any kind. if you look at the koffins in the background that you can't quite read, they are all the default koffin model and have onyx koin icon and say WQ. if a koffin isn't in the player's immediate view, it's changed to WQ and set to default crap. As soon as it comes into close enough view it changes to its regular settings... try it, look at the koffins pretty far behind the one you're on, and watch it as you slowly move up; it will transform once you get a certain distance to it. that's why you see them briefly flash to WQ when you scroll up so fast... since it will no longer be seen anymore, it sets it to default, but we just happen to catch a glimpse of it because the camera needs to accelerate to put it out of view which gives us a small amount of time to see it.