If he has made changes they're very subtle because despite the odd decent result against a top team (albeit most of the time in a period when they aren't performing well) the collapses still take place and we don't progress in terms of points.
I just don't think enough has changed, both in terms of personnel and style of play, there's some obvious things Wenger could try, if he showed some inclination to try something different he might get an easier time, in the last 10 years though, we've largely stuck to the tried and tested formula that fails to achieve success every season.