Mustrum_Ridcully
Legend
Because I, as a player, would want to know how serious my character was wounded as well. I don't like to be left in limbo.
But should you know that? How well does a person in real life know how bad wound is? How well do fictional persons usually know how bad it is?
There are basically two things that are used to describe the issues with the healing surge mechanic:
1) Ret-Conning wounds. You claim that a wound is a gashing wound, but the character recovers to full hit points and fights as if nothing ever happened. Worst case scenario is the character drops unconscious and someone narrates it as him dying due to the gashing wound, but then he rolls a 20 on his death save and regains hit points, and can go on fighting. The wound couldn't have been that bad.
2) Schrödinger wounds. You don't know whether you are wounded or not until after you have "measured" it by expending a healing surge or dying.
Pemertons point for 1 seems to be that you just should avoid narrations that make strong assumptions on the nature of wounds - maybe there is a lot of blood, but until the character dies or spends his healing surge, nobody knows how bad it is.
This leads us to "Schrödinger" wounds. The severity of a wound is indeterminate until we spend a healing surge or the PC dies from them.
But is that really a problem? At what point do you know a wound is fatal or not? Sometimes (at least in movies

One example for a dying character to avoid death is that someone spends an action to make a Heal Check - if the check succeeds, he is stabilized, and can expend his second wind (not merely a healing surge). The check DC is only 10 (IIRC). Maybe we should interpret this not as trying to staunch any wounds (though we could), maybe it is just looking at the wound and saying "hey, it's just superficial - no major arteries hit! You should be fine."