I’d much rather have HP ignorant be the default (I think it better supports for the feel of the game), and have it require a Perk like “Self Aware” to see the values exactly.
I also think we should lose asterisks, in addition to them change color, as health decreases, down to 1.
id add, that levels of first aid should have direct effect on precision of wound display.
also, instead of asterisks there could be descriptive display (fine, wounded, broken, bleeding, etc)
I can support entirely removing HP Ignorant and the associated hidden HP display in favor of always showing the numbers. If you know how much healing a bandage or first aid will provide, and know the breakpoints at which your health indicators change state, you can very closely estimate your current HP with HP Ignorant; not having the real numbers is just an annoyance.