It would be really convenient to be able to define an affix group once and then reference it across multiple rules.
I have a filter which has multiple rules which color items differently depending on how many tiers of “desirable affixes” the item has. The problem is that if I want to include a new affix in the pool of “desirable affixes” I have to go and edit every single rule to include it. This process is tedious and prone to mistakes.
If this were implemented, it would make it easier to create a general purpose item filter that can be quickly modified to suit a particular class/build just by changing the pool of desired affixes.