Refinements of Rescorla-Wagner model of classical conditioning
I don't think anyone has ever bothered (though Ralph Miller might disagree), since many of the 'failures' are outside of the model's purview. The model expresses as simply as possible the profound insight that we learn most when our expectations are not met. Many features of learning won't conform to this general principle (spontaneous recovery) but it doesn't make it wrong. Other features of learning emerge when the model is applied in layers or a hierarchy, rather than as a single unit (e.g., rapid reacquisition). Hence there is little pressure to adapt the model, although many adaptions have been proposed to account for one effect or another (e.g., Van Hamme &amp;  Wasserman, 1994; Dickinson &amp; Burke, 1996 etc). However these have usually limited it's generalisability due to overfitting.