Thanks for the comment, I was trying to get some culture building in there and trying to pack it into 1k words or less is tough so I think you are correct and it ended up a bit rushed.
I was trying to go for a thinking warrior that does like the battle, but not a berserker that gives into it. He does have a fury that builds within him while fighting, but it does not make him go blind to the contemplative side and he manages both. Essentially trying to place the Beastmen or at least individuals within as more complex than savage, marauding brutes.
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You're right - it is hard to fit everything into a thousand words, and I can definitely see you were trying to thread that needle. As for the details of Gnarl's characterization, that makes sense. A simple shift in the language from talking about how his blood fury 'builds' and 'rises' to describing him as 'stoking' or 'building' it (just as suggestions) I think would really help that become clear to the reader.