[Mathulhu]

I have found the lethality increases dramatically if you don't include the over penetration rules
...mumble...mumble...overly harsh GM...mumble...mumble...

However if you do use both sets of rules together the perceived threat increases far beyond what I believe to be the actual threat. In the most part bleeding rolls are pretty easy for a HT 12+ adventurer.

If you imagine a really bad wound is rolled at HT-5, for an average person is almost certain death. However they can often afford to fail a few times before the risk of death really kicks in. This gives them a drive to get out of the danger zone and their allies impetus to do something about it before its too late.

In addition the value of a skilled medical practitioner becomes really obvious and easy to play up. The group either needs someone to take the role or the search to find one becomes an excellent source of drama.