Very interesting, I guess the "speedrun" aspect explains the sudden cut from the Jackalope fight as well. And I had no idea Swagger was tied to screen transitions, I didn't pay a lot of attention to them so maybe it is working more-or-less as intended.
About Euthanasia, though, I did beat her without Crackerlacker this time around (I can't remember if I hadn't unlocked it yet or if I did and just forgot). The fight was pretty long, and yet she didn't use the healing move a single time, hence why I brought it up. I don't know how much RNG there is to enemy decisions in this game, though, so maybe it was pure dumb luck.