I saw in an old screenshot that the HP bar was on the top center of the screen before.
And now it's in the bottom left corner.
I know that most the time, HP and stuff like this tend to be put far away of the center of the screen, but it could be a great idea to, at least, let us choose if we prefer to have it like actually, or centered top, maybe bottom, etc.
The best way to display important information, in my opinion, and for game like yours, is most of the time like what you did for stamina.
A little widget, easy to read who give the information instantly without any need of thinking, and who doesn't require to lost track of our position on screen, during combat, etc, and so doesn't make us look in any corner.
I wonder if, maybe you could do the same things for HP?
I don't know the form it could take, the only idea I have in mind is maybe too simple: a single heart with multiple layer inside, and the lower our HP become, the smaller the inside heart in the widget become.
It could turned from bright green to red and pulsing rapidly when at 1 HP, and becoming black or something when at 0 after taking all the item from boss special room (don't know the name of it) where taking item reduce our max HP.
Maybe when at 2, if some support organelles and passive who activate at this state are equipped, a glow effect or something happen on the widget to warn the player that it's activated.
And for armor it could be display as a white layer around the heart, become thicker the more armor we have.
All of this could be something that player activate or not to suit there taste and may help to play better for some of us.