Surely some of what Martinez said is there purely as a symbol of his confidence in his players. Lukaku has been excellent this season, if he played for us I expect that we would lavish praise upon him. Barry is a character in the Everton squad, someone with experience in the game and surely backing him isn't a bad thing?
John Stones is very highly regarded, to the point that Chelsea were throwing silly money at Everton with the intention to complete a deal. Partly the price of potential, and partly because of his current ability. Barcelona have also been named as a potential suitor.
Yes, he might be deemed to be a bit ott with some of his comments, but ALL managers can be accused of that with their own players.
Will be interesting to see what happens if Everton don't finish top 8, but, I can't see him being sacked for it.