I went ahead and made a plugin that allows you to set the properties of a ParticleEmitter with easing functions.
It’s non-obtrusive for ribbonbar users as it won’t create another plugin button, rather it pops up an interface when you select and only select one particle emitter.
Here’s a video of it in action if you’d rather see what it does before committing to downloading it:
Let me know how it works!
Here’s the download again.