Should have been an option. Garrisons were just a gold sink and afk station, that devalued gold, all trade goods, even crafting in that expansion, and made the entire expansion worse because of their inclusion.
Mission boards replaced daily quests, and you didn’t even need to log into your account to claim and redeploy your troops, could just grab the app and log in once a day to gather garrison reasources.
I’m not sure why you think garrisons was a good example, the removal of them would have literally been a boon to the game.