On the Sound FX:
The effects are OK, but they need to be alot more violent. Not shure how to put it. They should be suden, quicker, louder.. Much more uncomfortable. On my computer, even with volume at max, they still seem muted and muffled. A sense of distress in the grunts would be good too.
On Wound Effects:
Aim needs to be thrown off, ALOT. You really need to discourage the old west "two people shooting each other" (Sorry Forrester). You need to encourage landing the FIRST shot, and getting the drop on your oppenent. The punishment for being shot should be severe and dibilitating.
Limping... If limping causes conflicting animations with the slide/dive animations, then by alol means cut the Slide/Dive along with run, while wounded. I have absollutely no problems with not being able to slide home while shot in the gut. Truth be told, the slide/dive features are gimicks (admittedly fun/usefull gimicks). Wound effects are gameplay. Go with gameplay everytime.