/console bloattest 1 - Might make nameplates larger but it fixes the disappearing ones.
/console spreadnameplates 0 - Makes them overlap like they used to.
/console bloatnameplates 1 - Makes nameplates larger depending on threat percentage.
/console bloatthreat 1 - Makes nameplates resize depending on threat gain/loss. Only active when a mob has multiple units on its threat table.
Just posting the rest of the floating health bar commands here.