Good point, this is in fact something we are considering for one of our upcoming releases. I just raised the priority in our tracking system so hopefully it will make it into a release very soon.
@phellinger and @zprekopcsak, perhaps a more generalized operator to extract attribute importance weights from any model would be even more helpful? I know that there is not necessarily a single definition of how to determine attribute importance inside a multivariate model, but in theory, one simple approach is to take the list of all model attributes and remove them one at a time from the final model to see the resulting deterioration in model performance, and rank them accordingly (where the attribute that leads to the greatest decrease in performance has the highest weight, and all other attributes' weights are scaled to that). This can of course be done manually today (and even done with loops to cut down on repetitive operations), but it would be nice if RapidMiner added an operator to do this automatically for any model and output the resulting table as a set of weights. In my view this would answer a very common question from business users about attribute/variable importance in multivariate models.
@Telcontar120: sounds like an interesting idea, but might be misleading. If you have two highly correlated attributes then removing one will not change performance at all, even though one of them may be needed for a good model.
Otherwise, I agree that explaining and adding narrative to a model is very important and we are considering various ways to improve there.
