Arsène Wenger overcomes resistance to change, Aitor Karanka wants fighters more than Stewart Downing, and José Mourinho has more pressing concerns than getting revenge at Chelsea One of the many criticisms routinely directed at Arsène Wenger concerns his tactical conservatism and it is fair to say that he has seldom deviated from his preferred and predictable 4-2-3-1 in recent years. But on the back of a crucial drop in form Wenger has actually started the last two games with a new plan, playing…