If newer English translations helps a person that's good. If others rather only use KJV more power too them. The Lord isn't concerned in what language you use to read or pray. He's concerned about a persons heart and eternal soul.
Unfortunately there are so many translations that one person can be unaware that someone else is quoting scripture.
Some translations have a theological axe to grind. I tend to be as suspicious of new translations as I am of the “new” findings of the Jesus Seminar.
“Old English” is not hard to understand. Anyone in a science for medical field has to essentially learn Latin. There are people that are fluent in Klingon, a language that does not exist! So, it can be done.
Further, the message of the Bible is veiled. It is not a checklist or rule book. It is like a grand Shakespeare play its message is much larger than a verse or chapter. Having the meaning obscured can pique the mind into looking deeper.