I wouldn't be surprised if they at least made the DC to save Arabella easier. Or added a DEX roll to intercept the snake before it bites her, which is something I think really should've been in from the start.
It'd be really interesting to see how Kagha reacts to almost getting a child killed. Who knows? Maybe that would scare her straight. Actually killing Arabella forces her to double down on her evil or admit she royally messed up, but seeing the possible consequence without it actually going through could snap her out of her mindset pretty quick.