The Rogue Tomato said:
First, the original KJV (and early modifications) are written in Modern English. I know that sounds wrong (it sure seems far from being "modern"), but that's the correct term.
I'm surprised nobody stated the obvious reason why it needs updating. If a pastor has to explain a passage because the people don't understand the Modern English, then what that pastor is doing is ad-hoc translating the passage into contemporary English.
The only difference between that process and most modern translations is that modern translations don't always use the same non-English sources as the KJV. However, many modern translations provide you with footnotes to show you what the KJV's sources (like the TR) said.
As for misleading passages, I can name at least one:
Isaiah 45:7
I form the light, and create darkness: I make peace, and create evil: I the Lord do all these things.
KJVOs have a choice here. They can either say this is misleading because the word translated "evil" really means "calamity". Or they can say God really creates evil, just as it says. If there's a third option, I can't think of it.
You are correct, we have been speaking modern English since around 1550. or so (depends on which source as to when we changed from Middle English to Modern English)
The problem is not with the use of the word "evil" in Isaiah 45;7, it is with our simplified understanding of the English language.
Of course this is shown in for instance Websters 1828, but you would expect a KJV proponent like myself to use that dictionary.
e·vil [ee-vuhl] Show IPA
adjective
1.
morally wrong or bad; immoral; wicked: evil deeds; an evil life.
2.
harmful; injurious: evil laws.
3.
characterized or accompanied by misfortune or suffering; unfortunate; disastrous: to be fallen on evil days.
4.
due to actual or imputed bad conduct or character: an evil reputation.
5.
marked by anger, irritability, irascibility, etc.: He is known for his evil disposition.
This definition is from Dictionary.com. That is not the first place a theologian is going to go, but it clearly shows the word has two different usages. You could use your Strongs, but no need, the English is clear.
In other words, no need for an update there.