It would be really useful to be able to see hp % instead of hp left, I'm not sure if this is still doable after the changes blizzard made to nameplates a few months ago though.

Yes, I plan to add config for this much like it existed before.

I am converting over from Aloft... what was it like pre-Legion?

I'd like to see the ability to add Max Health and Percentage, and even change from the default short values to the full values if possible.

Before legion, you could change between deficit, percent, current or blank health text depending on whether or not a unit is at full health. That's what I'll be adding.