Found another interesting glitch, this time involving SCH and the Brave Edge. It's essentially a SCH k(BE) Cancel.
The command for SCH's Brave Edge is SCH kA+B+K. However, delaying it causes something odd to happen. If you input it more like SCH K ~ SCH A+B+K (hitting A+B+K after SCH K has finished) you'll do SCH K and then stance shift into SBH - but with a Brave Edge flash. This creates a Brave Edge stance shift, and you've just payed .5 meter for a stance shift with no special properties. However, if you shift back into SCH, pressing SCH K automatically makes SCH k(BE) come out instead, for no meter and no Brave Edge flash. You can also do this with any stance shift - the A+B+K is read both as a late Brave Edge input and as a B+K stance shift input, so just make it 4A+B+K, 2*8A+B+K, or 6A+B+K and you can go into any stance you want.
You can also "hold" the SCH k(BE) - that is, as long as you remain in any stance after having done the glitch, SCH K will always give you SCH k(BE). So inputting something like this:
SCH

~ SCH

~ SBH


~ SRSH


~ SRSH


~ SCH
...will still give you a meterless, flashless SCH k(BE).
As far as applications go, I can see it having a few possibly useful, if limited, applications. A theoretical one: Pyrrha + Ω gets a free A+B GI if she recognizes SCH k(BE)'s flash on time, and she'll be looking for that when you go into that stance, since she gets good damage and makes you waste meter. The fact that you flashed, didn't do a Guard Break move, she whiffed her aGI, and you're now in an entirely different stance WILL be confusing - mixups are a definite possibility. This can also apply to people who try to duck SCH KK, since it also puts them in a mix-up position.
Some disadvantages I'm seeing: doing this glitch disables SBH k(BE) entirely.