From my experience, it was pretty simple to describe almost any wound just from the source of the damage, the location of the damage, and the degree of the damage. A Giant cockroach bites a leg for a serious wound? That is "it's mandibles slice through calf muscles making it difficult to stand let alone run". A Bear bites a hand for a Critical wound? That is "The bear's teeth tear through your hand shattering bones and almost severing it completely, you drop whatever is in it and it is useless until healed". The players usually weren't too concerned about the gritty details during the battle, as long as they knew what its modifiers were.
Agreed. The normal descriptions end up being repetitive, so I improvise them depending on the attacker, the situation, the location of the hit, etc. In the end, I don't read the descriptions anymores, I only look at the hits/bleeding/stun/penalties of the attack.
Well, I made my own with copies of the book, but still, one table for everything would be still better.
Cool if it works for you. To me that would be oversimplifying.
Not really. I see two ways to work on a united table:
1) The range for results is the same for every attack (41-50, 51-60, 61-70, etc.), so we can have a unique table where we find something like: Crush - 13 hits &1 round stunned / Puncture - 12 hits / Slash - 14 hits & -5 penalty
Even magical, slaying, etc criticals can be added, only depending on the design of the chart. As for the description, as Pyrotech said above, every GM can come up with an improvised description for the attacks, the same as we come up with improvised dialogues with NPCs.
2) For every result range and hit location, the chart could give an average result. For example, 13 hits. Then we can have a modifier that always applies to this average, depending on the kind of attack. In this case: Crush attacks - Add 1 round of stunned / Puncture - Decrease damage by 10% / Slash - Increase damage by 10% and add -5 to penalties.
Either way it would simplify the results, but not so much as to make them equal. You still would get different tendencies of damage depending on the type of critical.