Garner definitely under the radar and probably the next big hype job. He could easily be in the Wharton/Anderson conversation for England by the time the world cup comes along.
I'm not going to pretend I know how good he is just yet. He's impressed me the few times I've seen them play but like you said, Everton don't tend to dominate possession so its a difficult role to judge. Just found it crazy how Everton were missing Dewsbury Hall and Gueye yesterday, so he was the only first choice midfielder available and up against Anderson, Gibbs White and Douglas Luiz. Incredible performance to hit the numbers he did against them without his ideal partners. Leon Osman is a very good judge of a player too and he's been raving about Garner for the last few weeks and even arguing that he is their best player this season.