You said that Proverbs 16:27 can't have KWR as KR because it is not spelled
that way in other quotes. I think the word is only used 9 times. Some other
words that are more common are spelled without the vav sometimes. "Sign" alef
vav tav is spelled alef tav in Exodus 4:8 and 12:13. "Generation" is usually
dalef vav resh, but sometimes it is dalet resh like in Exodus 3:15.