|I know you're a bit busy with Rock and such and you've got things to deal with in newer addons like Parrot but if you find the time, maybe you could consider this feature:
It would be cool to be able to have the plugin positioning stretch to the width (optionally, not mandatory). Would work sort of like justifying text; spacing would be set so the plugins take up the full width of their parent bars.
Just a thought. Could be potentially useful for many UIs.