I have the same need as Timo, I need to adjust the auto add rules based on magento attribute, but i am still not ready to update to magento 2.0.
So i have though of another solution, and was wondering if adding multiple rules (auto add) will both be considered,
meaning that if i add 1 rule that only monitors category X, and another rule that monitors category Y, will the product be auto added to the listing only if it is added to both categories on magento (cat X and cat Y)? or all the products that are added to category X and all the products that are added to category Y on magento, will be added to the listing?
is it an "AND" or "OR" rule?