Problem: It is not possible to combine two or more rules, you always have to create a completely new individual rule. If you want to refer to one condition that does not change in many cases this is a lot of additional manual work.

Description: most common example is having a promotion rule that refers to a category and defines a discount of percentage.
- rule A: category trousers + 20% discount
- rule B: category trousers + 40% discount

Proposed solution: you just need to change the discount condition