Perhaps it’s too early in the morning, but how is {la' Dun vIghro' tIQ} confusing?  The only alternate translation I can think of is “Commander, the ancient cat is great.”  Using punctuation prevents any misunderstanding.  That’s what it’s for.

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Voragh

From: mayqel qunen'oS

Recently, on the "learn klingon" facebook group, there was a discussion, with regards, whether the two nouns of a noun-noun construction can have adjectives.

For example {la' Dun vIghro' tIQ} "the ancient cat of the great commander".

Personally, I would avoid using such constructions, because they could be confusing.