Thanks for the review and sorry for the late reply!
I feel the same about the lack of animation for eating, it would be cool to have one but I don't know how to do it without breaking the pace (not to mention I'm bad at doing animations). As for your suggestions:
1- I think that would be possible with the right plugin, but there are many technical issues to solve (like on what condition the enemies would despawn, or how to place the enemies on tiles around Yaxi).
2- This is definitely possible, though this action would need to have its own action key. I'll put this on my backlog.
3- Unfortunately that's impossible to do on RPG Maker, not to my knowledge.
The songbird's behaviour is not exactly a bug, more like a known issue I don't know how to deal with. The idea of having a temporary buff that cancels the effect seems good, I'll probably go with that.
Punching your stomach is supposed to be proportionally more efficient the more preys you have eaten, but I don't remember if it was functional in the version I posted back then.