I just think you know what you're getting with Compton. His strengths are that he's got a good defence and he's very good mentally. That means he won't give his wicket away that often, but also means he doesn't take as many chances, which is why he's deemed as a slow player. I don't see the issue with it in Tests though, you just want the person who's going to get the most runs, no matter how long it takes. Perhaps he's a throw back, but I think if all matches were played on pitches that were good for bowlers, he'd be one of the first people you'd pick, because he will survive, more often than not.