I think it's time to go back and evaluate what Kobolds are in Dwarf Fortress based on observed behavior and the raws.
First up, the Ethics
[ETHIC:KILL_ENTITY_MEMBER:PUNISH_EXILE]
[ETHIC:KILL_NEUTRAL:ACCEPTABLE]
[ETHIC:KILL_ENEMY:ACCEPTABLE]
[ETHIC:KILL_ANIMAL:ACCEPTABLE]
[ETHIC:KILL_PLANT:ACCEPTABLE]
[ETHIC:TORTURE_FOR_FUN:ACCEPTABLE]
[ETHIC:ASSAULT:PERSONAL_MATTER]
[ETHIC:TORTURE_AS_EXAMPLE:UNTHINKABLE]
[ETHIC:TORTURE_ANIMALS:UNTHINKABLE]
[ETHIC:TREASON:UNTHINKABLE]
[ETHIC:SLAVERY:UNTHINKABLE]
[ETHIC:EAT_SAPIENT_OTHER:UNTHINKABLE]
[ETHIC:EAT_SAPIENT_KILL:UNTHINKABLE]
[ETHIC:MAKE_TROPHY_SAME_RACE:UNTHINKABLE]
[ETHIC:MAKE_TROPHY_SAPIENT:UNTHINKABLE]
[ETHIC:MAKE_TROPHY_ANIMAL:UNTHINKABLE]
[ETHIC:TORTURE_FOR_INFORMATION:NOT_APPLICABLE]
[ETHIC:OATH_BREAKING:NOT_APPLICABLE]
[ETHIC:LYING:NOT_APPLICABLE]
[ETHIC:VANDALISM:NOT_APPLICABLE]
[ETHIC:TRESPASSING:NOT_APPLICABLE]
[ETHIC:THEFT:NOT_APPLICABLE]
From this, we understand they still cannot talk, and that they have no appreciation for personal property.
They don't find killing their own members appropiate and exile any who do. Fighting is resolved with individuals. Probably their disputes are settled with fighting, but it is very rarely to the death.
Killing anything not a member of the "tribe" is acceptable. You can torture sapient beings, but only for fun and no other reason.
They do not make trophies out of living beings. They don't betray themselves and they don't enslave others. (Kobolds and Animal People are the only ones who have "Unthinkable" for both treason and slavery, and Animal People are currently copied from kobolds.)
So, with this simple understanding, we view their stats.
[PERSONALITY:ANXIETY:50:75:100]
[PERSONALITY:TRUST:0:25:50]
[PERSONALITY:ACTIVITY_LEVEL:50:75:100]
[LOCKPICKER]
[TRAPAVOID]
[FLEEQUICK]
[LIKES_FIGHTING]
[UTTERANCES]
[PHYS_ATT_RANGE:STRENGTH:450:950:1150:1250:1350:1550:2250] +
[PHYS_ATT_RANGE:AGILITY:1200:1400:1500:1600:1800:2500] ++
[PHYS_ATT_RANGE:TOUGHNESS:450:950:1150:1250:1350:1550:2250] +
[PHYS_ATT_RANGE:RECUPERATION:450:950:1150:1250:1350:1550:2250] +
[PHYS_ATT_RANGE:DISEASE_RESISTANCE:450:950:1150:1250:1350:1550:2250] +
[MENT_ATT_RANGE:ANALYTICAL_ABILITY:150:600:800:900:1000:1100:1500] -
[MENT_ATT_RANGE:FOCUS:150:600:800:900:1000:1100:1500] -
[MENT_ATT_RANGE:CREATIVITY:150:600:800:900:1000:1100:1500] -
[MENT_ATT_RANGE:INTUITION:150:600:800:900:1000:1100:1500] -
[MENT_ATT_RANGE:PATIENCE:450:950:1150:1250:1350:1550:2250] +
[MENT_ATT_RANGE:MEMORY:0:100:200:300:400:450:500] ---
[MENT_ATT_RANGE:LINGUISTIC_ABILITY:0:0:0:0:0:0:0] unattainable
[MENT_ATT_RATES:LINGUISTIC_ABILITY:NONE:NONE:NONE]
[MENT_ATT_RANGE:MUSICALITY:0:0:0:0:0:0:0] unattainable
[MENT_ATT_RATES:MUSICALITY:NONE:NONE:NONE]
[MENT_ATT_RANGE:EMPATHY:0:100:200:300:400:450:500] ---
From this we see that they have high anxiety, low trust, and high activity level. They like to fight and cannot talk well.
They are actually STRONGER than humans (then again, everyone is), they are the most agile creature, and are tougher than humans in most areas. Their ability to analize situations is lower than a human or elf's (significantly by dwarves), and they can't focus as well. They are more creative than a goblin, but less than humans or elves (significantly by dwarves). They have less intuition than dwarves or humans (significantly by elves) but more than goblins. They have the same amount of patience as a dwarf, which is greater than a goblin's by a little, and significantly more than a elf's. They have the worst memories, and no linguistic or musical ability. They have very little empathy.
Putting it alltogether, we have creatures that not only can't talk, but don't even really understand the concept of patterns that provide communication. They probably aren't capable of remembering anything so complex, and therefore they are organized with bodylanguage alone. They have a packish mentality where they are constantly fighting for dominance amongst themselves, but usually stopping short of death. They don't seem to think themselves in the position of their victims, and find the "game" of torture enjoyable. (they probably torture each other as part of their "dominance" competitions). They have no sense of personal property and use what they have, but only if it is useful. They disdain anything that doesn't appear to be useful right away (which might be why they don't ever develop audible pattern recognition).
It IS possible though that Kobolds are deaf. If they are deaf, it would explain their lack of music and intelligible language.
So, a group of wolfish individuals who inflict pain for dominance and take anything that seems useful.
Thoughts on my opinions?