Vixey, I never expect reviews, so anytime you got the time is fine -- there ain't no deadline!

'Tis an honor to hear from you!
I will say this first and foremost -- if I write about Kayra again, it will be in a setting prior to this story. I don't like doing the 'you thought they were dead but they're actually not' thing... too easy for me. Plus this was truly meant to just be a quick one-shot that inserts itself into the original film. That's part of the challenge for me, finding something that can fit (mostly) seamlessly as though it was some sort of deleted scene.
If I'm understanding your thoughts correctly on the 'stick' line... that was intentional, actually. A friend of mine is big on puns, and he's kinda transferred some of that over to me in the past year or so. The line was meant to be both a bit of a homage to the original line and a play on the fact that Kayra was about to get whacked with... well, a stick! It's the kind of thing I can picture them doing. They ARE hyenas, after all, and part of the comic relief in TLK.
Finally: the Nala plan was between Sarabi and Nala. I like to think Kayra and Nala pitched the idea to Sarabi. In the long run, both of them were running off to find help. Nala waited back at Pride Rock in the event that someone trailed Kayra -- which they did. And with literally the entire pride and Scar's ranks dealing with Kayra, where does that leave the rest of the patrols? Depleted, meaning Nala's able to slink out of the Pride Lands without anyone noticing. Since Kayra was a headstrong lioness, I picture her being the one to volunteer to be the possible bait. It wouldn't have been a suicide mission in her eyes necessarily, nor for the others. Her mouth kinda got her there. I think that the intent would have been that if she was caught, Scar would punish her in whatever way he saw fit, while Nala escaped. Obviously he took it a step further.
I hope that clears some things up. It requires a thought process looking at their plan to see how what they were thinking, but I didn't want to include that in the story because I see that as bogging the pace down with boring details. If this were in the movie, I would think this would be much easier to present, because some things are better shown, not said, and a visual production could convey that quite effectively.
Thanks for the review! Glad to be able to talk about this thing on a deeper level than the usual 'hey, thanks for reading!' I really appreciate it.