First of all I must agree with the consensus that as ministers of the gospel of Jesus the Christ, we should preach the written word, and must not add, inflating or season our sermons with our personal opinion, calming that is the word of God says as Tony Evans did!
However, it is nothing wrong with a teacher or a preacher, telling their listeners what they believe the text is saying as long as the stay in context with what is written, and make it aboundingly clear, that is their theological perspective on what was written.
After all, the apostle Paul the champion writer of the New Testament gives his theological opinion where he says in 1 Corinthians 7:12" not the lord but I. and in 2 Timothy again Paul says that I suffer or do not permit a woman to teach or have authority over over a man. And Paul has a different opinion on divorce that opposes Jesus position on the grounds for divorce. And "The Church" favored Paul's position over Jesus position on divorce. Also the "early church fathers."
Moreeover, "the early church" fathers concluded that the word trinity that is also not written in the Bible is a theological conclusion that explains the three dimensional personal of God. Christianity is a montheolitic religion, God is not three persons according to Deuteronomy 6:4; Isaiah 45:5; I am the LORD, and there is no other; There is no God besides Me. I will gird you, though you have not known Me. Mark 12:29; John 5:7. So one cannot deny the connection between 2 Kings 5:27; 7:1-3; and 8:1-4; in is not a fantasy of Tony Evans is a logical theological perspective: However, the Bible does not name the four Lepers, but one does have wonder why would a king hang out with a leper? But if you follow the text, Gehazi was consulted to veryify the Shunammite womans story. In chapter 8. Also it should be noted, that Gehazi's punishment of leporcy was not contagous, according to Leviticus 13:13,17; because 2 kings 5:27; says he was with as snow meaning he was clean.