Increased Alice's movement speed in the Abyss. Not thoroughly tested, but it may help improve things.
Specifically, movement speed on floors 1–50 is now 3x the original, and even faster on floors 51–1000. Note that this is a movement speed increase, not combat speed, so I can't be entirely sure it fully resolves the problem.
Further optimization will take some time. I've been pulling all-nighters leading up to release, and I'm pretty exhausted lately.