So part of the reasoning for getting rid of combat add ons is because they’re making it easier to see things using the game’s UI. But that still leaves 10 iterations (vanilla+9 expansions) that were designed without this philosophy. I know for myself and others, add ons are immensely useful for achievements, farming, etc.
So here’s my idea for a compromise: Cut off combat add ons for only current tier/expansion stuff, or at least Midnight and beyond, while still giving add ons for older stuff access. It will still let them have the pruning for current/new content, while allowing farmers to have the help for the achievements.