If Chase is the architect of an England win then no it would be a stroke of genius/a bold move but if he's carried by the likes of Sinfield, Burgess, Roby etc then yes it is a mistake.....Chase was 'carried' in the game against Australia. He's played 'lesser' teams since then, if he performs against New Zealand then I will apologise but he's had 3 cracks at Australia, 1 crack at New Zealand, 1 crack at Wales and has failed to impress in any of these games.
If say Sam Tomkins failed to impress in this amount of games against this calibre of opposition people would be rightly saying picking him over Hardaker was a mistake.