Something commented to another thread already but..
I've provided working houserules for these areas of the game:
New healing system
New monster critical
Advanced combat maneuvers
Monster A/C/E system improvements
New death rules
All of these have passed several session of playtest and are much more well received than original rules.
NEW HEALING SYSTEM is basically either First Aid (support) or Resilience check (self) based. Instead of automatically healing toughness amount of wounds healing is slower and more elaborated making wounds also more dangerous and persistent. Healing draughts are not used as "magic potions" but as to enhance the normal recovery. Also added a long-term care option of 3 nights rest for an improved check. Disease checks also covered in the system.
NEW MONSTER CRITICALS is replacing the critical wound system of cards which is focused on PC attributes than monster capabilities. Not many monsters are affected by a critical wound of +1 misfortune to Fellowship or Intelligence after all. My chart has three categories of attack type and much more severe critical impacts. Also, the number of critical wounds inflicted with a single blow impacts the severity of the critical effect.
ADVANCED COMBAT MANEUVERS improves the value of maneuvers as many PCs have difficulties of putting into use their "gain one free maneuver". This also enhances collaboration as you can with maneuvers now more clearly help other PCs, distract enemies, protect fallen comrades etc.
MONSTER A/C/E SYSTEM IMPROVEMENTS mainly clarifies what A/C/E can be used for but also converts stress and fatigue towards monsters as reduction to A/C/E pool. I think its better than "stress and fatigue are wounds for monster" default rule. Why are there "inflict stress to enemy" actions for PCs anyways?
NEW DEATH RULES. I don't like binary expectation of death happening with certain threshold so I created a two-scale probability system taking in consideration the number of wounds and total severity of critical wounds. Two different scenarios are calculated as a reference for probabilities.
Please find them all documented as charts and tables here:
http://dl.dropbox.com/u/12641813/WHFRP%20House%20Rules.pdf
Always interested to get feedback.