I mean I think that depends on the person. Peersonally, I think modern critical theories really illuminate aspects of the text, like the gender dynamics, but others will tell you critical theory is "a euphemism for dogma and nonsense." However, I don't think that means it's confusing per se, it just means we're drawing different conclusions. How do you define a "better" interpretation of a classic novel? What makes one set of meanings drawn from the text "better" than others? I think if you define what a better understanding of the text means to you, then you can decide if critical theory helps or hinders that.