First I intend to distribute hits, bleeding, stuns, penalties, and "other" - bone, organ, muscle, tissue damage.
I've started using the hit-location rules by the second or third session, so I adapt each crit according to that - I started doing this after the player with the recoilless assault rifle regularly hit dmg cap 110 when aimed bursting ... we got tired of perforated intestines. So, now we have perforated thighs and groins, shoulders and lungs, mouth and necks, and so on ... I do sometimes adjust the crit slightly to fit the new location, like say increase penalty, but perhaps decrease hits or stuns. Depending on severity and location. And on whether or not they rolled a 66.*
This is what I intend to do really, make the critical tables less location specific - in order to allow more location-specific results. If that makes sense. This means that the flavour text in some tables would be less specific - and you know, some weapons just are less location specific, like shotguns and flamers at a few range increments beyond the 1st.
*Side-note: I must admit that in the old days of playing this game, the fantasy version, I never got into the unmodified roll of 66-spirit. After having played Star Wars from FFG and Numenera from MCG, and other games of similar designs, I ... well, I do now.